Audio Horizons TP 2.0 Preamplifier

Sabai,

No it is internal and replaces the current internal power supply which is on the left side of the unit as you face the front. It uses one tube. It really made a very special improvement in the unit as I wrote about in a previous post.

Contact Victor Comerchero, spokesperson for AH, for more details. He will not steer you wrong.

I don't think it is advertised as an upgrade on his website, but I learned about it from Victor in email conversation.

Sabai,
You can read a brief comment I made on the new fuse along with other user's comments.

http://app.audiogon.com/listings/tweaks-audiohorizons-platinum-reference-more-than-a-fuse-2013-11-23-accessories-95670

I was wondering if anyone received an owner's manual with their AH preamp( any version). I don't recall getting one and was lately wishing that there was one. I would like to get a schematic of my TP 2.0 to look it over. I haven't talked with Joseph or Victor yet...I thought I'd get current owner's comments first. I didn't see one available on their web site to download.

Sherod,

I have a rudimentary users manual when my unit was a 2.0 but no schematic in that info. Another omission in the early manuals is the fact that the preamp inverts polarity. Make sure all who use this preamp switch positive and negative speaker cables EITHER at the amp end or speaker end (not both) to get the correct phasing.

Sherod,

Thanks very much for all the details.