Which JBL Amp to buy?

ibm_jennifer · 15th April 2009, 02:04

Friends,

Currently I have a JBL 75.4 and its powering a GT5-12 SW and 2*607C. Now I need one more Amp to power another component system. My question is should I buy a JBL 604 or JBL 300.1. I think both cost me almost same.

So if I take the 300.1, I have to power the Sub with this mono Amp and 4*components using 75.4

Here I will get 175 RMS for Sub but 142w RMS for 4 channels.

if I take 604, I will power the Sub and Front Components using 75.4 and the rear components will be powered by 604 in bridged mode.

Here I will get 284 RMS for Sub and 142w RMS for fronts and 160w RMS for rear.

Which will be a better buy?

abhinav.gupta88 · 15th April 2009, 02:06

It will be better to power the sub of the 300.1 and power the 607 and the other setup with the 75.4

Is the 300.1 still available.
It was replaced by the 3501.

If its at the same price, i'd advice the mono.

ibm_jennifer · 15th April 2009, 03:11

If 300.1 is not available, should I buy a 604?

Quote:

if I take 604, I will power the Sub and Front Components using 75.4 and the rear components will be powered by 604 in bridged mode.

Here I will get 284 RMS for Sub and 142w RMS for fronts and 160w RMS for rear.

Will the above statement be true? I have a 4 ohm Sub and 2 ohm components.

rider60 · 15th April 2009, 03:34

Dude just grab the mono, the 300.1 is replaced by the GT-5 series mono and now, for your purpose please buy the 3501 mono, you should be able to run 2 pairs of 607c components off the 75.4!

and your GT-5 sub will run great with the new 3501 mono.

the 300.1 mono will be really really old stock so just forget that idea.

ibm_jennifer · 15th April 2009, 03:46

GTO 350.1 cost me 8K in grey. Will it perform better than GTO 1004 which is available for 9k?

But I have doubt? Is there anything extra in a Mono Amp than a Full range Amp?

ameenmaj · 15th April 2009, 12:44

Merely looking at the specs 1004 is better than the mono. Please correct me If I am wrong.

nitrous · 16th April 2009, 01:32

Are you going to use a DVC sub to require a Mono?

ibm_jennifer · 16th April 2009, 03:29

No DVC Sub, its just the GT5-12.

karankapoor · 16th April 2009, 09:39

mono amp are different from full range they are used to drive the sub,and for your equipment i will suggest you go for a mono amp.
drive your front and rear through 75.4 and the sub through the mono.

nitrous · 16th April 2009, 13:40

The GT5-12 requires 275W RMS and the bridged channel of the 1004 pumps out 320.
Compare that to only 250 from the 3501.

ibm_jennifer · 16th April 2009, 14:54

nitrous, is there anything special in a mono amp for sub?

degenr8 · 17th April 2009, 13:21

Quote:

Originally Posted by ibm_jennifer

nitrous, is there anything special in a mono amp for sub?

Yes and the simple answer is monoblock amps are more powerful and ideally suitable to drive sub woofers .You should always match sub with amp whose RMS power is almost equal.

My current sub woofers setup
I have Alpine MRP –M450D (M stands for monoblock D stands for a class D which is good for low frequencies (sub) and more efficient) powering a single Kicker VCVR 12”( it’s a company vented enclosures with kicker cvr sub)
The CVR is dvc sub
- 400 watts RMS power
- 2 ohm voice coils
and the Alpine amp produces an output power of
-400 watts RMS x 1 at 2 ohms.

ibm_jennifer · 17th April 2009, 14:03

Quote:

monoblock amps are more powerful and ideally suitable to drive sub woofers .You should always match sub with amp whose RMS power is almost equal.

But my question is 'Is there anything extra in a mono block amp other than power/wattage'? Why they are priced high?

ImmortalZ · 17th April 2009, 14:16

To get the sky high power levels for a single channel, they are, most of them, Class D. And Class D is complicated to engineer and expensive to build.

nitrous · 17th April 2009, 20:32

Between a 2-ch amp and a mono amp that produce the same power at the same impedance, the mono would be more efficient and it is engineered keeping in mind the RMS wattage requirement and the low frequencies it would work with.

But, a mono is worth it only if you're going to use its power @ 2 ohms (1 ohm for some exotic ones) which can be done only if you're using a dual 4-ohm DVC with the voice coils wired in parallel.

Not to forget that at the end of the day, RMS is something. 320W RMS from a GTO 1004 is far superior to 250 from a GTO 3501. Both being JBL amps from the GTO series.

15th April 2009, 02:04	#1
ibm_jennifer BHPian Join Date: May 2008 Location: Chennai Posts: 529 Thanked: 7 Times	Which JBL Amp to buy? Friends, Currently I have a JBL 75.4 and its powering a GT5-12 SW and 2607C. Now I need one more Amp to power another component system. My question is should I buy a JBL 604 or JBL 300.1. I think both cost me almost same. So if I take the 300.1, I have to power the Sub with this mono Amp and 4components using 75.4 Here I will get 175 RMS for Sub but 142w RMS for 4 channels. if I take 604, I will power the Sub and Front Components using 75.4 and the rear components will be powered by 604 in bridged mode. Here I will get 284 RMS for Sub and 142w RMS for fronts and 160w RMS for rear. Which will be a better buy? Last edited by ibm_jennifer : 15th April 2009 at 02:08.
	() Thanks

15th April 2009, 02:06	#2
abhinav.gupta88 Senior - BHPian Join Date: Sep 2007 Location: Delhi , India Posts: 4,092 Thanked: 325 Times View My Garage	It will be better to power the sub of the 300.1 and power the 607 and the other setup with the 75.4 Is the 300.1 still available. It was replaced by the 3501. If its at the same price, i'd advice the mono.
	() Thanks

15th April 2009, 03:34	#4
rider60 Senior - BHPian Join Date: Mar 2007 Location: Bhagyanagaram. (A.K.A. Hyderabad) Posts: 1,620 Thanked: 56 Times View My Garage	Dude just grab the mono, the 300.1 is replaced by the GT-5 series mono and now, for your purpose please buy the 3501 mono, you should be able to run 2 pairs of 607c components off the 75.4! and your GT-5 sub will run great with the new 3501 mono. the 300.1 mono will be really really old stock so just forget that idea.
	() Thanks

15th April 2009, 03:46	#5
ibm_jennifer BHPian Join Date: May 2008 Location: Chennai Posts: 529 Thanked: 7 Times	GTO 350.1 cost me 8K in grey. Will it perform better than GTO 1004 which is available for 9k? But I have doubt? Is there anything extra in a Mono Amp than a Full range Amp?
	() Thanks

15th April 2009, 12:44	#6
ameenmaj BHPian Join Date: Sep 2008 Location: Thrissur/Hyderabad Posts: 77 Thanked: 0 Times	Merely looking at the specs 1004 is better than the mono. Please correct me If I am wrong.
	() Thanks

16th April 2009, 01:32	#7
nitrous Senior - BHPian Join Date: May 2004 Location: UAE/Lon/Madras Posts: 6,965 Thanked: 325 Times View My Garage	Are you going to use a DVC sub to require a Mono?
	() Thanks

16th April 2009, 03:29	#8
ibm_jennifer BHPian Join Date: May 2008 Location: Chennai Posts: 529 Thanked: 7 Times	No DVC Sub, its just the GT5-12.
	() Thanks

16th April 2009, 09:39	#9
karankapoor Senior - BHPian Join Date: Apr 2008 Location: in the car!!! Posts: 1,675 Thanked: 6 Times	mono amp are different from full range they are used to drive the sub,and for your equipment i will suggest you go for a mono amp. drive your front and rear through 75.4 and the sub through the mono.
	() Thanks

16th April 2009, 13:40	#10
nitrous Senior - BHPian Join Date: May 2004 Location: UAE/Lon/Madras Posts: 6,965 Thanked: 325 Times View My Garage	The GT5-12 requires 275W RMS and the bridged channel of the 1004 pumps out 320. Compare that to only 250 from the 3501.
	() Thanks

16th April 2009, 14:54	#11
ibm_jennifer BHPian Join Date: May 2008 Location: Chennai Posts: 529 Thanked: 7 Times	nitrous, is there anything special in a mono amp for sub?
	() Thanks

17th April 2009, 14:16	#14
ImmortalZ Senior - BHPian Join Date: Jan 2008 Location: Trivandrum Posts: 2,179 Thanked: 488 Times View My Garage	To get the sky high power levels for a single channel, they are, most of them, Class D. And Class D is complicated to engineer and expensive to build.
	() Thanks

17th April 2009, 20:32	#15
nitrous Senior - BHPian Join Date: May 2004 Location: UAE/Lon/Madras Posts: 6,965 Thanked: 325 Times View My Garage	Between a 2-ch amp and a mono amp that produce the same power at the same impedance, the mono would be more efficient and it is engineered keeping in mind the RMS wattage requirement and the low frequencies it would work with. But, a mono is worth it only if you're going to use its power @ 2 ohms (1 ohm for some exotic ones) which can be done only if you're using a dual 4-ohm DVC with the voice coils wired in parallel. Not to forget that at the end of the day, RMS is something. 320W RMS from a GTO 1004 is far superior to 250 from a GTO 3501. Both being JBL amps from the GTO series.
	() Thanks