Audio Horizons TP 2.0 Preamplifier

Very interesting set of experiences between all of us thus far.

Bill
Grannyring (Reviews | Threads | Answers)

Precisely.

It must be an issue of impedance/gain matching. My amps (VAC Standard 160 monoblocks) have full output at 1.75v and 100kOhms. 32dB input gain. High gain, high impedance amps.

I believe I have these specs correctly.

How about the rest of you?

I will look up the specs for my SS amp tonight. I am also getting a nice triode tube amp Friday and will play with that!

I also think the output or gain of the AH is an issue to look into. The version one owns and the use of XLR or RCA
connections perhaps changes the output or gain. Not sure if impedence changes.

Here are the specs from the AH site.

TP 2.1 TECHNICAL SPECIFICATIONS
Frequency Response: 10 Hz to 50kHz +1/-2 dB
Total Harmonic Distortion (THD): 0.05% @ 1 kHz, -20 dBv, A-weighted
Dynamic Range: Better than 90 dB
Signal to Noise Ratio: Better than 105 dB
Channel Separation: 90 dB @ 1 kHz
70 dB @ 10 kHz
Gain 20 dB or 10dB with B upgrade
Output Impedance: Less than 600 ohms
AC Voltage: 120 Volts
AC Frequency: 50/60 Hz.

I have the upgraded B(balanced?) and N version and use the XLR connectors. The gain is 1/2 or only 10 db instead of 20 db for RCA. I am not a tech guy and perhaps this means nothing but having to turn the knob higher to achieve the same volume.

My B version XLR connections sound better in my system vs the RCA. It is easy for me to compare both as I own both AH RCA and XLR cables.

My AH DAC has two settings for output a low and high gain. I use the lower setting. Not sure if this has any impact?

Love to hear from Victor on this latest subject.

Bill

I auditioned the B version and used the balanced outputs. The 10dB output gain theoretically should be ideal for my high gain amps.

Grant,
I feel a bit uncomfortable mainly because I seem to be the only one so far who has issues with the new, upgraded preamp( besides yourself, that is). I just want to make sure that all is okay before I make any final assessments. I'm currently communicating with Victor who is awaiting a response from Joseph on what I can do to determine why I am hearing what I'm hearing.

Another vote for keeping the discussion on the thread as I too am interested, knowing that nothing is gospel and that you have to heard for yourself with your room, equipment and set of ears. I mostly use a grand piano in the same room as my reference as I go about changes to my system. Have to say that the original decked out AH 2.0(cca's,BN design) seems pretty darn close to ideal to me with my equipment. But I have not heard a broken in 2.1 yet.