Those seeking to retrofit their O2′s with an ODAC can now preorder the O2+ODAC rear endplate for the Box B2-080 enclosure:

Not sure why this rendering is so dark (Nick?!). They’ll match our O2 Front Plates.

We’ve switched to a specialty machine shop based in Silicon Valley. Artwork on new endplates will be laser etched instead of silkscreened. Cost is slightly higher, but overall machining quality of our O2 and ODAC plates will be better than ever.

All ODAC options are now available for preorder:

• Assembled ODAC Board
• Standalone ODAC
• O2+ODAC Combos

The assembled ODAC board is sold barely above wholesale price, at the request of NwAvGuy’s manufacturer. This is to keep the DIY project cost low. Longer explanation here.

We’re Moving!

Our case manufacturer asked for a favor earlier this week. He’s speaking today at a big corporate meeting and needed to show off a customer with “the most interesting application”. We provided a short summary:

Growing so quickly hasn’t been easy. We’ve streamlined most tasks to keep up with production and shipping, but now we’re out of space. So, we’re moving 1 mile down the road to a new office in Glen Carbon, Illinois.

• JDS Labs is an official distributor of the ODAC
• An ODAC preorder page is live
• ODAC production began late last week in the USA, and will take about 4 weeks (release = May 2012)
• NwAvGuy has not released specific information yet; we have little more information than what’s already revealed in his blog [Edit 4/18/2012: Now Released]
• ODAC absolutely requires a headphone amplifier for proper operation

I know many of you are looking forward to installing ODAC in your O2′s, or having it retrofitted at our factory. (For those new to this project, three wires from ODAC must be soldered to input jack terminals P1 on the Objective2, a couple traces must be cut, and the 2x9V batteries must be removed.) A retrofit is a nightmare of a design choice for us. Sorry, NwAvGUy! Soldering one DAC is no big deal for a do-it-yourself’er, but we’re faced with soldering hundreds. And that means hundreds of our past O2 customers might want to send their amps in for the upgrade. Cost for the O2+ODAC retrofit will be announced after ODAC is released. But we’ve devised a far more elegant solution.

Option 1: Standalone ODAC in Enclosure

NwAvGuy equipped ODAC with an optional 3.5mm line-output jack, for use with other headphone amps. It just so happens that ODAC fits into the same custom aluminum enclosure we built for c421. Nick sketched new end-plates, and voila:

This is only a preview! We’ve printed prototypes and tested fit. Design files are now under review by our machine shop, so things could change based on manufacturability.

Placing ODAC in a standalone enclosure means:

• Objective2 owners can add an ODAC without modifying their perfectly good amp
• All features of the O2 are retained (no need to remove 9V batteries)
• Standalone ODACs can be paired with any headphone amp!
• Same performance as coupled to the O2

This standalone ODAC edition will be added to the preorder page as soon production begins–any day now. Available approximately upon release of ODAC.

Option 2: O2+ODAC Combo

As NwAvGuy plans, we’ll offer ODAC preinstalled in new O2′s, which will look something like this:

These will also appear on our preorder page after production begins. Available approximately upon release of ODAC.

Option 3: O2+ODAC Retrofit/Upgrade

Identical to option 2, but for those who already own an Objective2. Available in late May.

Option 4: Assembled ODAC PCB

Consists only of an assembled ODAC circuit board–no amplifier or enclosure. This is the only offering on our preorder page for now. Ships mid May.

ODAC SUMMARY

As you can see from the above images, the ODAC product lineup is well underway. All prices and preorder options will be available by the end of May.

A Note on Reviews

The first time I browsed to Headfonia.com, I couldn’t imagine seeing our products on Mike’s awesome review site. It was all high-end gear, way beyond anything we’d built at the time. So I was surprised when Mike e-mailed me for a cMoyBB sample in early 2011. The review went well.

Note: We are not a Headfonia sponsor. In fact, we don’t sponsor or endorse any audio publications. I’d rather see our great products spread through the audio community by word of mouth, and use cash-flow instead to increase product development and distribution.

Headfonia Review - Flyin’ High: JDSLabs C421

Anyway, Mike posted a well received review of our c421 last month, with the OPA2227. But he was quite opposed to the AD8620, totally contradicting my opinion.

Then came the controversial Objective2 review, which led to a follow-up article from NwAvGuy.

I’m not taking sides. I fully endorse NwAvGuy’s work and his rebuttal, and I’ve always been a fan of Headfonia.

I personally prefer to listen to c421 with bass boost on, with DT-880′s. I have nothing bad to say about the Objective2. It’s a technically brilliant amp. But I’m a bass boost guy. Hence, cMoyBB.

The fact is, audio is subjective. NwAvGuy can post measurements and discuss psychological theory all day long, but we’re humans. Our brains operate subjectively (“expectation bias”, as NwAvGuy wrote).

Case in point, Nick says O2 and c421 sound the same. But Nick isn’t an audiophile and doesn’t spend his free time reading audio forums and reviews. He just knows that JDS Labs sells nice headphone amps.

I don’t intend to discredit Mike or Headfonia. There’s a lot of truth to what NwAvGuy writes, especially in regards to expectation bias. Mike e-mailed us after the O2 review went live; I replied explaining that I wasn’t disappointed. He expresses his honest opinion in his reviews. NwAvGuy blogs about objective audio engineering. JDS Labs has to tie everything together. We build amps that we believe in, both in terms of design, and in terms of taste/expectation bias. We receive dozens of emails each week asking for comparison of one amp to another. While I could steer a customer one way or another, I sincerely avoid replying in depth to any of these messages.

Read reviews and blogs. Read specifications. Look at pictures. Borrow a friend’s amp, or go to an audio meet. In the end, pick an amp that meets your needs and expectations.

I asked, ‘Sorry, what do you mean?’

“You placed the barcode face up.” He shook his head and explained that not many customers realize the time he spends flipping cards over for the cash register to read…

No big deal. Similarly, you’ve probably seen these before and will agree that they’re a minor detail, but nevertheless awesome:

Adhesive Bumpers! Unfinished c421 pictured.

These adhesive bumpers attach to any surface. Use four on the bottom of your cMoy, Objective2, or c421 to keep the amplifier from sliding off your desk. They also work great in-between your amp and audio source or phone.

Red 3mm LED

Red 3mm LEDs have also been added to our store. You’ll need one of these to build a rechargeable cMoyBB v2.03R.

Production Updates

The bumper photo above is an engineering sample of our final c421 enclosures (without final brushed coloring). c421′s will ship at the very end of February.

Free adhesive bumpers will be included with every c421 preorder and case shipment.

We posted a short year end summary after 2010, at which time I drafted a few goals for 2011. The year turned out nothing like I’d planned…

Between the day job and JDS Labs, I found myself working well over 100 hours/week by spring. Working 40 hours/week during college had been tough, but 60 hours on top of a full-time job? It was enough to drive anyone (and their wife) insane. On June 2, 2011, I took my boss into a private conference room and verbally resigned effective July 1st.

He stared at me in disbelief. “You have an excellent career here,” he said. This moment was unreal. I heard myself expressing thanks, and assuring him that I was saddened to ditch an excellent team of engineers, but that it was something I had to do. I had customers, circuits, and an array of plans for which there were not enough hours in the day.

Six months have passed and I can say without a doubt that taking a full-time job in 2009 was one of the biggest mistakes I’ve made. JDS Labs sales soared as soon as I began working from home in July. What recession?!

Nick and I now run a typical startup. One hour we think we have the day under control. The next, we’re a week behind on production, and will work 12-18 hour shifts to catch up.

I wake up at 7am to find 40-something unread e-mails, even though the box was at zero just six hours prior. By noon, we crank out a pile of amplifiers and another fifty e-mails. We head to lunch and try to ship 30-60 orders afterwards, squeezing into the post office around 4:58pm.

So, 2011 was nothing short of a success. Sales grew by 300%, we expanded our product lineup from nine items to 30+, released two fantastic amplifiers, doubled our staff (from 1 to 2!), and have definitely outgrown my home office. 18-wheel tractor trailer/truck drivers don’t like to back into residential areas; there’s a seriously unusual DIY fume exhaust system taped to a window at the front of the house; the basement contains three workstations and enough shelves of electronics to be mistaken for a sweat shop; UPS delivers daily. I’m sure our neighbors are pleased.

Startup Lessons Learned in 2011

Looks amazing, doesn’t it? Nick had a difficult time stepping away from the 3D model:

Our JDS Labs branded O2 front panels and fully assembled O2′s are available now for preorder.

c421: Quality Inspection 3

Continuing from our last update, the third batch of c421 cases arrived last week. To our great dismay, the manufacturer damaged our $1500 custom die (a tool to make the cases), so batch #3 turned out far worse than the first two batches. Instead of scratches, batch #3 pieces weren’t even the correct shape.

We’re moving case production to a high precision aluminum manufacturer. These guys understand the perfection we’re seeking and will ship nothing less than excellent. Since they’re starting from scratch, it will be February before final c421 cases are ready.

All c421 preorders will be shipped this week in batch #2 cases. You will be able to request a final case for free in February. Batch #2 cases aren’t terrible; they’re simply not up to our standards. Keep watching for more updates…

Side note: We had no trouble with c421 front panels. O2 panel production really will be done by January! We’ll post a “lessons learned” story when this mess is finished.

O2 Objective2 PCB, Front

The O2 has created a stir in Head-Fi.org’s do-it-yourself community. After posting one too many “objective” (or possibly stubborn) comments, NwAvGuy found himself banned from the forums. He proceeded to design O2 for maximum benchmark performance to prove his points. It’s large and heavy, so hardly worth consideration as a portable amp, however, O2 so far lives up to its name.

c421: Quality Inspection 2

We hoped quality control of c421 enclosures wouldn’t turn into a saga, but here I am posting a progress update. The second batch of enclosures arrived in much finer condition than the original run. Although better, we also rejected batch #2 due to minor manufacturing scuffs. Dozens of phone calls, e-mails, and meetings later, we’re approximately two weeks away from receiving enclosure batch #3…

Assembled c421's in enclosure batch #2 (sitting atop our office subwoofers).

Therefore, the November 14th ship date may slip. We’d rather ship great products late, than ship ‘okay’ products early. All c421 preorders will be held until the final batch of cases are available. Onto the good news:

• Anyone who has preordered may request immediate shipment in a batch #2 case; final enclosures will be made available in a few weeks (free + shipping).
• Samples were sent to professional reviewers last week, and initial feedback of c421 is strong! Customer Tony .G writes:

  “Got the headphone amp and wanted to say that I’m quite happy with my purchase!  Can’t wait to put in some good listening time.  I’ve just given it a limited run and it is quite stellar.”

• Hexibase of PWK Designs posted a great unboxing:

Welcome, Nick!

JDS Labs is quickly expanding. Nick has joined our team to help with soldering, programming, and new product development.

Rechargeable cMoyBB v2.03R

When we released the NiMH Module earlier this year, the idea was to bring recharging to the cMoyBB in a versatile fashion. Owners of existing cMoyBBs could add the feature to their older amps, and there was no need to revise the cMoyBB circuit board.

cMoyBB v2.03R Printed Circuit Board

But, the charging module placed too many limitations on the amp: no 18V support, batteries were difficult to remove, and the dual DC jacks confused new users.

As of this week, the NiMH Module is discontinued. In its place is a brand new cMoyBB v2.03R circuit board, which adds simple NiMH recharging support to the cMoyBB.  The cMoyBB finally accepts single- or dual-9V NiMH batteries!

Slip-on on 5.5 to 3.5mm Barrel Adapter

Ordering a rechargeable cMoyBB has been streamlined as well. Simply select standard or rechargeable.

To make matters even easier, we now stock a rare 5.5mm to 3.5mm barrel adapter. This allows you to power the cMoyBB from common AC/DC adapters, including most laptop power adapters.

NiMH vs. Alkaline vs. Li-Ion

Adding recharging support to the cMoyBB has never been a high priority, despite popular request. We’ve avoided it for a few reasons:

• NiMH batteries are typically 1V weaker than alkalines = Less voltage swing.
• NiMH recharging circuits lose 0.7V-1.2V on top of the battery voltage! More lost output power.
• NiMH run-time is about half that of alkaline batteries
• Separate AC/DC adapter required
• Long charge time (10-12 hours)

c421 - High Performance Li-Ion Headphone Amplifier

If you’re using moderately low impedance headphones (under 64 ohms), a single 8.4V NiMH is usually adequate for high volume amplification. Even if you have higher impedance headphones, voltage is no longer an issue since the cMoyBB v2.03R supports 18V (2x9V)!

For top performance, a fixed voltage Li-Ion amp like c421 is the way to go. You’ll always have maximum output power, long run-time, and short charge time. For those who have already pre-ordered c421, we’re 1 week ahead of schedule!

• The c421 preorder page is now up! Note that the release date is tentative, so the page cannot yet be found through our store, and the formal announcement e-mail has not been sent out. We’ll send the official message when the date is 100% certain.
• Features, specifications, and a description of c421 can be found on the preorder page.
• Fewer than 95 amps are available for pre-order.
• Price: $169

Quality Inspection 1…

The first batch of enclosures arrived Monday, but we rejected the shipment due to a total lack of packaging. Every single case was scratched. I don’t know about you, but if I’m paying $169 for a device, it better look decent! The manufacturer is redoing the job immediately. This sets us back 1-3 weeks, but high quality is more important than speed.

Timeline

Assembled c421 circuit boards are scheduled for arrival by October 24th [Edit: Arrived OCt-21]. If you preorder now and get impatient, we can send the amp in a temporary rejected enclosure. You can order another enclosure later for the cost of shipping. Just send us a note.

October 31 is the earliest expected shipment date. Realistically, we anticipate all preorders to ship by November 14.

Rocky Mountain Audio Fest

It’s 1PM Wednesday and I’m scrambling to fly out to Denver for the 2011 RMAF. We’re not exhibiting, however, I will be wandering around the show. Tweet (@jdslabs), e-mail, text, or call if you’d like to hear c421!

Screws, light pipes, and the battery are not shown…

Rear view of c421, showing countersink screw holes. Color of end panels not final!

Obligatory size comparison to a popular portable source

Size comparison at another angle

We expected to have real samples in hand by now. So what happened?

A reputable aluminum extrusion shop promised us 6-8 week lead time and a a competitive price, so we faxed over the deal on July 1. Three weeks passed and I recieved a phone call from their company president, Bob. He said, “Hi, John. I have some bad news . . . We dropped the ball on this one.”

Bob’s company  had severely underestimated their bid and refused to fabricate C421′s enclosures unless we forked over another $10,000. Wasn’t gonna happen, Bob! $10k would have ruined our project goals.

Although this delayed c421 by three weeks, everything has worked out for the best. We’ve used the extra time for additional circuit tweaking. And, we signed a better enclosure deal with an amazing extrusion shop whose manufacturing plant is only four hours south of our office! Their staff has kindly invited JDS Labs to witness on-site sample inspection.

Samples are due approximately 4 weeks from today. I will personally inspect the enclosures and post pictures if possible. Final device specifications and pricing will follow soon afterwards.

One final note: We’ve received countless offers from past customers and new faces seeking to review c421. Thank you! The first production batch will be a small run of only 100 units. Just two amps will go out for initial review (more later). A pre-order page will be posted around the time reviews go live, no more than 4 weeks before we can ship.

Like the design? Hate it? Let us know!

AD8620ARZ with BrownDog Adapter

After our recent opamp swapping article, we received several requests for pre-soldered opamps. Therefore, Analog Devices AD8620 opamps are now available for purchase.

NiMH Adapter for cMoyBB

Also new is a 9V NiMH charging accessory. This small board fits into the cMoyBB’s enclosure (or other cMoys) to provide battery recharging functionality. The charger uses the same DC jack as the cMoyBB v2.03, allowing it to utilize any cMoyBB-compatible power adapter. Installation is easily accomplished with a hole-punch and double-sided adhesive (included). No soldering is required.

Tenergy 9V NiMH and Charger in cMoyBB

One obviously needs 9V NiMH batteries to go along with a NiMH charger, so we now carry Tenergy 9V, 200mAh NiMH low self-discharge batteries. These rechargeable 9V’s are available in single- or two-packs. Typical rechargeable NiMH batteries lose charge in a matter of days, but low-self discharge technology enables these batteries to maintain 80% charge after 12 months of storage.

Order the NiMH Adapter and a Tenergy 9V with a new cMoyBB and we’ll install the set for free!