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Old 2nd August 2011, 10:37 AM   #11
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thanks both of you.
does the quality of amp come from speaker or power section or pre section?
what is the specialty in guitar amp speaker??

for 14 w amp what should be the speaker size and resistance for good bass effect?

can u plz suggest a good solid state based preamp that will close to valve sound.........

for tda2030 what size of heat sink is required?

thanks
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Old 2nd August 2011, 03:28 PM   #12
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The quality should be high at all But the sound is primarily shaped by the preamp, then the speaker and at the end the Poweramp.

12 "are typical of guitar speaker, and they bring enough bass (at least at home). A typical guitar speaker has to 100dB and at 4-5kHz Frequency range an overshoot.

My preamp is not bad, but on runoffgroove.com, there are also nice preamps.

As a heat sink reaches a mounting plate made of aluminum, the housing for example.
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Old 2nd August 2011, 05:50 PM   #13
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thanks for the reply, there are several projects on the run groove. which one you suggest??
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Old 2nd August 2011, 06:13 PM   #14
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The question has to decide your taste.

One of my favorits is BSIAB2 as preamp, for example
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Old 2nd August 2011, 07:17 PM   #15
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thanks moschfet
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Old 4th August 2011, 01:54 PM   #16
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Default to moschfet

i have connected my already built preamp to my solid state sub woofer i used to connect my computer. but the sound that is appearing is not that i am looking for. but i am little confused how the tda2030 will sound.
do u have any idea??
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Old 4th August 2011, 04:04 PM   #17
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Yes, I can imagine. And that is the reason why guitarists play on guitarspeaker.

This is the circuit with the 'modification' especially for Guitar Amps:
Click the image to open in full size.

R5 worsens the damping factor of the amplifier. Similar to a tube amp. The rest is wired nearly as in the data sheet.
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Old 4th August 2011, 08:46 PM   #18
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what do u mean by damping factor??

when i will choose the speaker can i choose any general audio speaker or do i have to choose any special guitar speaker??

good night
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Old 4th August 2011, 09:03 PM   #19
Minion is offline Minion  Canada
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Half of the reason why a Guitar amp sounds the way it does is because of the speaker ..... Guitar speakers are made to have a certain frequency curve and a frequency range of arround 50hz - 6000hz and to break up early and in a certain way ..... Hi-Fi speakers are made to have a flat frequency responce and a wider frequency range and not break up ...... you will know the difference when you hear it ......

You can get a good 12in guitar speaker for under $100 and for as low as $50 .......
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Old 6th August 2011, 11:12 AM   #20
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Default hello moschfet

can i use roland cube 30x speaker for my project ??
then do i need different power section??
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