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Author Topic: What to consider in Head Amp and Cabinets  (Read 594 times)

Offline mr.HTML

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What to consider in Head Amp and Cabinets
« on: February 26, 2013, 09:12:46 AM »
Mga Sir,

Ano po ba dapat i-consider kapag gagamit ng Head Amps and Cabinets, meron bang compatibility issues between the two?
Need ba dapat ng mataas na watts for Head Amp? meron kasi ako nakikita na ohms and i am not quite sure if it's really necessary na hanapin yung ohms nung makaka-pair nya.  :mrgreen:

Offline lolwat

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Re: What to consider in Head Amp and Cabinets
« Reply #1 on: February 26, 2013, 09:00:27 PM »
Ok ganito:

Kung 8 ohms ang rating ng head mo, pwede mo siyang ikabit sa cabinet na rated 8 ohms or higher. Sa madaling sabi, pwede kahit 16 ohms, pero hindi pwedeng 4.

Sa wattage naman, medyo ganun din. Kung 50 watts ang head mo, pwede mo siyang ikabit sa cab na equal or greater wattage rating. So pwedeng single 50 watt speaker, or 4x12 na total ng 240 watts.

Ang recommendation ng ibang site na nababasa ko, yung wattage ng amp head mo multiplied by the square root of two (approx. 1.4142...) yung minimum na speaker cabinet wattage na dapat mong iparis sa kanya. Yun daw yung difference ng RMS at peak wattage ng amp, para sure na hindi mo masira yung speaker kung itotodo mo yung volume ng amp.

Ex. 50 watt head x 1.4142 = 70.71 watts

Pero ang alam ko, may RMS at peak wattage ratings din ang speakers kaya hindi rin siguro masamang pantay lang yung wattage ng speaker at ng amp. Basta wag lang mas mababa yung sa speaker, masisira yun.

Offline gradual nothing

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Re: What to consider in Head Amp and Cabinets
« Reply #2 on: February 27, 2013, 12:00:20 AM »
lolwat is right.. in layman's term.. if malaki ang wattage ng amp mo kesa sa speaker mo.. sabog ang tunog na ilalabas ng speaker mo kapag nilalakasan mo na ang volume, sisirain na ng amp mo ang speaker habang tinotodo mo na din ang volume. walang pinagkaiba yan sa sound system nyo sa bahay kapag mismatch ang amplifier sa speaker in terms of power. pwedeng mas malaki ang wattage ng cab wag lang liliit sa amp
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Offline skunkyfunk

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Re: What to consider in Head Amp and Cabinets
« Reply #3 on: February 27, 2013, 12:29:12 AM »
Mga Sir,

Ano po ba dapat i-consider kapag gagamit ng Head Amps and Cabinets, meron bang compatibility issues between the two?
Need ba dapat ng mataas na watts for Head Amp? meron kasi ako nakikita na ohms and i am not quite sure if it's really necessary na hanapin yung ohms nung makaka-pair nya.  :mrgreen:


If you like mixing speakers in 4x12s or 2x12s, the power handling of the cab will always be  the number of speakers in the cab X the speaker with the least power handling.

Example.  If you get a 4x12 with two G12T75s (75 watts each) and two Greenbacks (G12M25), the maximum power your 4x12 can handle will be 4 X 25W = 100W.  (That is assuming your speakers all have the same impedance.)

Always match the impedance for maximum power transfer.  In general, tube amps will not blow even with lower impedance loads than the prescribed.  Say your Marshall tube head is set to see a 16ohm load, and you connect an 8ohm load, or even a 4 ohm load, that will be fine.  In fact a tube amp will not  get broken with a short circuit load. 

SS amps are the opposite.  They can work with higher impedances than prescribed.  Even an open circuit load (infinite load) is fine.

Offline mr.HTML

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Re: What to consider in Head Amp and Cabinets
« Reply #4 on: February 27, 2013, 10:05:25 AM »
Thank you po sa matyagang pag papaliwanag, even tho na nose bleed ako it's really helpful  :)

Grabe hanggang dito hinahabol ako ng Math kainis lang. Well anyway it's really good to know na may mga dapat iconsider sa pag pili ng Amps and Cabs.

Thanks to the following

skunkyfunk
lolwat
gradual nothing


Offline titser_marco

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Re: What to consider in Head Amp and Cabinets
« Reply #5 on: May 10, 2018, 08:06:24 PM »
impedance and wattage
I'd rather be sharp than flat.

Online guitaricci

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Re: What to consider in Head Amp and Cabinets
« Reply #6 on: May 15, 2018, 05:54:08 PM »
space!! may lugar ka bang paglalagyan? kung nakatira ka sa isang studio type apartment/condo...i don't think a head/4x12 cab will suit you.

If you have space...then that's when you consider compatibility.  :)
Its not the kill, Its the thrill of the chase...

Offline ryechua

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Re: What to consider in Head Amp and Cabinets
« Reply #7 on: May 16, 2018, 11:53:00 AM »
for me, first thing to consider is roommate/housemate/neighbor. can they tolerate a cranked tube amp (half/full stack)? lol
doh!!!

Online r_chino18

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Re: What to consider in Head Amp and Cabinets
« Reply #8 on: May 16, 2018, 12:59:46 PM »
The head + cab pairing must look good (i.e. the head should not overhang from the cab)!!  :lol:

Online guitaricci

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Re: What to consider in Head Amp and Cabinets
« Reply #9 on: May 16, 2018, 04:16:07 PM »
for me, first thing to consider is roommate/housemate/neighbor. can they tolerate a cranked tube amp (half/full stack)? lol

A cranked Marshall Major tapos naka full stack ka pa. Bigyan mo na lng ng ear muffs mga tao sa paligid  :lol:
« Last Edit: May 16, 2018, 04:18:37 PM by guitaricci »
Its not the kill, Its the thrill of the chase...