2. amps-preamps
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Hovland caps VS Auricaps

I have linestage preamp base on 3 tubes 12AU7, and I already upgrade the output coupling capacitors with auricaps 2.2 uf/400 volt with great result i.e. the base was tight and nice treble.
I got another Line stage preamp (same type) with
1. Output coupling capacitor with hovland caps 2uf/400 volt
2. Replace all the resistors ½ Watt regular resistors with 1 Watt PRP resistor
3. Replace stock diode with fast recovery diode on power supply
4. Bypass on power supply with 1 uf/400
The result was more realistic on midrange & treble but I lost the base compare the preamp with Auricaps.
How to get more on base?
Do I have to put hovland caps 4uf/400 or increase the value of by-pass capacitors?
Is there any capacitor that will increase the low freq with nice real midrange and treble?
I need advice or any body with experience on this matter.

Best regards,
Adri
ajs2125

Showing 3 responses by ajs2125

ajs2125 OP
11 posts
 
Sherod,

My amp is VTL MB125 with Input Sensitivity / Impedance
0.75 V / 145KW.
What happen if I put another 0.68 uf/400 or 1 uf/400 hovland caps in parallel?
I think I have wait until 150 hours to get fully broken.
Thanks Sherod , I will let you know.

ajs2125 OP
11 posts
 
My amp is VTL MB125 with Input Sensitivity / Impedance
0.75 V / 145Kohm.
VTL TT-25 with Input Sensitivity / Impedance
1.16V / 120Kohm.

ajs2125 OP
11 posts
 
Thanks for your information and I am still learning about system synergy and make the sound close to realistic.
I like Hovlands much better on the midrange and treble over Auricaps, but let see what is happen after fully broken.
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