Bi-Amp configuration

t93288

May I raise a question that if I go for Biamp, the most ideal setup must be the 2 identical power amp is connected. Is it possible to use two different brand power amp to play in good sound?  What are the most important factors must be faced?  I can see 3 of the factors will affect the performance, the 2 amplifies must match with these factors (or may allow a little bit delta).
1. output watts (250)
2. Slew rate (>200)
3. output gain (29db)

What else?

racewong

如果兩套AMP都差唔多輸出, 相差可能只是DF.

咁玩BI AMP可能得喎.

t93288

i am planning to have a set of Jeff Rowland Synergy 2i as pre amp. Rowland model 8ti(BASE) and Rowland 201(Treble) as power amp to form bi-amp configuration.

technical specificaitons:-

Synergy 2i output impedence is less than 100 ohm
8ti input impedence > 36k ohm
201 input impedence > 40k ohm
(matching no problem)

model 8ti (gain: 32db)
model 201 (gain: 32db)
(matching no problem)

8ti output power (250 watt 8ohm)
201 output power (250 watt 8ohm)
(matching no problem)

Even the 2 power amp are from the same brand, but in different era and the technology are different, 8ti is class AB, 201 is class D. I expeced the speed may not be the same. Will this be the hurdle of the bi-amp setup? Any solution to fix the speed matching??

(It is hard to find 2 good condition Rowland model 8ti in the market).

Any high hand can provide suggestions? thanks

t93288

No experienced Bi-Amp player and Cfu here?? Can share?

ccli1996

t93288 發表於 2025-8-25 08:24
No experienced Bi-Amp player and Cfu here?? Can share?

I am playing Bi-Amp for more than 10 years.
Refer to the info of my signature area, I use Bi-Amp of same brand (in order to get the same gain factor) of two different models.
Class A Amp (45W @8ohm, DF 500) to drive the Mid Range and Tweeter
Class AB Amp (270W @8 ohm, DF 500) to drive Woofer

Just my personal perspective, for using different amp as Bi-Amp connection, the most critical factor will be the cross over point of your speaker.
If it is two way speaker with cross over frequency being on the typical mid frequency range (e.g. several kHz) that is lying on very sensitive range of human ear.  I would recommend to use two identical amp of same brand and models.
My case is 3 way speaker and the split frequency point for the two amps is around 400Hz (human ear is not sensitive in this Low-Mid frequeny range) between "Woofer" and "Mid Range & Tweeter".  I use this setting for about 10 years without any compliant.  Why I use Bi-Amp (Class A for Mid Range & Tweeter, Class AB for Woofer) is try to maximize the advantage of these two types of Amp.  For Low frequency, I like the sound to be more powerful and high speed while for Mid and High Frequency, I like it to be a little bit more gentle and slow to provide more warm sound to avoid easy ear fatigue while listening for long time especially for listening big orchestral music.

t93288

ccli1996 發表於 2025-8-25 11:12
I am playing Bi-Amp for more than 10 years.
Refer to the info of my signature area, I use Bi-Amp o ...

Thanks for your information. cheers

Cfu just out of curiosity, in my case as according to your experience, will you also consider putting Rowland 201 at treble and Rowland 8ti at base? Or wise versa? What will be the maximum benefit of bi-amp? thanks   

tst123

可以用同廠同期產品，但一部 class D 一部 class AB  好易出問題，8T聲底相對慢，201相對快，好難夾聲，師兄日後又要用線材就

我以前玩過625及825，不建議你用8 T夾 291， 事倍功半

新一代 class D己經唔同哂

我入左部 Tidal intra, 可以滿足哂你所有要求，它可以做4聲道後級又可以選擇做2聲道後級

平凡人

可以发email 问问jeff rowland原厂的人啊

t93288

tst123 發表於 2025-8-26 13:54
可以用同廠同期產品，但一部 class D 一部 class AB  好易出問題，8T聲底相對慢，201相對快，好難夾聲，師 ...

Thanks CFu,

This is also my concern, so the purchasing of 201 is temporary on hold. Or I have to wait for another Model 8ti.