Review: ZERO 24 BIT/192KHz DAC/Headphone Amp/Pre-Amp - Page 104

Looks good as WU has the OPA627 BP for $11 each while lawrence lists the OPA627 BP (single, ceramic) for $28 each! I assume they are both the same (BP) and ceramic in nature. With a browndog ($3) that makes it about $25 + shipping versus Lawrence's price of $61 shipped. Both from Hong Kong.

I like Lawrence and would like to do business with him but George Washington(s) are nice too!!

The browndog I reference is this one: Single-to-dual Op-AMP Adapter - DIP version (p/n 021001) - 021001 Is this the correct one to use? or was there another recommended? I seem to recall an alternative adaptor being mentioned that saved space (?).

Hey! I noticed that on the front page of Cimmaron (browndog) they state that:

"COMING SOON! - Pre-mounted OPA627 op-amp on either 970601S or 020302S adapters."

Cimarron Technology, Inc.

I will email them and ask when and how much! May be worth the wait and not have to order from 2 places.

Wu has nice prices, but the OPA627AM is in a TO99 package: , only the OPA627BP is PDIP.
So you have to buy some kind of adapter. I like this one: OPA627AU Adapter.
Edit: Check out edguetzow's post... Cimarron has these adapters too.

What are the musical and audible differences between OPA627 A and B? Anyone?

The OPA637 isn't Unity-Gain Stable.
@Penchum: Does the Zero handle a gain greater/equal 5?

Looks good but the price comes to about $60 US. Similar to Lawrence's price although it looks nice and compact in design. Not much else right now on ebay.

Anyone tried this: Bursonaudio Discrete Op-amp

diykits didn't have any OPA627BP a few days ago, but they did however have OPA627AP for $8, of which I ordered two.

A bit pricey for a discrete opamp. You can find hermetically sealed quality units around $30 used, but the question is how to fit them in the space. Burson solved that problem for you.

Hmm.... right now I ordered one of these "OPA627AU Adapter" for $38 shipped.

Can you literally just swap your dual op amps for one of thes babies and it will be an instant upgrade?

Or do the only work in certain designs? Im thinking for my zero dac.

Dave,

Much thanXs for you most excellent review. And much thanXs for "discovering" this lovely product.

I've been looking for something like this, and tripped over your post - Hey luck got strike me sometimes, right ;-)

Looks like my next stop is EBay!

Again much thanXs,

angel

I got OPA627 AP's from Lawrence, not BP's. I'm still waiting for his answer about the broken op-amp and damaged DY2000.

I have right now 2xLT1028 with Browndog in the DAC burning in. They get pretty hot, but the LT1361's in the headamp are only warm.