You are not logged in. [Log In]


Forums » General Discussion » Stereo » ADA-1500: A BEAST of an amp!

Page 2 of 2 < 1 2
Topic Options
Rate This Topic
#432412 - 06/02/19 01:29 AM Re: ADA-1500: A BEAST of an amp! [Re: Mojo]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 7060
A single M5 hits a valley of 6 Ohms at the low frequencies where I witness the 1500 and 1000 shutting down. Two in parallel go down to 3 Ohms at those low frequencies and 2 Ohms in the lower mid-range. That's well below the ADA 4 Ohm spec.

The saving grace for the ADA is that at low frequencies, the M5 load is almost purely resistive. That's not the case in the lower mid-range but there's less energy in that band compared to the lows so no shut-downs there.

Agreed that shunting boosts the current to a point. Then the voltage collapses and that's the end of that.

The ADAs are well-designed from what I can see.
_________________________
BANNED
A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
had v2;v4 FOC rock

Top
#432454 - 06/04/19 01:00 PM Re: ADA-1500: A BEAST of an amp! [Re: Mojo]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 7060
I really love the protection on these ADA amps. Before they can distort or worse (ignite or pop a component), the channel in distress gracefully temporarily shuts down. When I say temporarily, I mean transiently. It's not like it turns off and takes minutes or even seconds to come back again. Sometimes the protection is silent, and sometimes I can hear a slight pop. I suppose there's a turn-off transient somewhere that arises in the circuit. That's not a big deal; it's just an observation.
_________________________
BANNED
A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
had v2;v4 FOC rock

Top
Page 2 of 2 < 1 2

Moderator:  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 
Forum Stats

15,392 Registered Members
16 Forums
24,305 Topics
430,496 Posts

Most users ever online:
2,082 @ 01/22/20 10:43 AM

Top Posters
Ken.C 18044
pmbuko 16437
SirQuack 13669
CV 11743
MarkSJohnson 11445
3 registered (tmuhr, marcd, Mojo)
275 Guests and
3 Spiders online.
Key: Admin, Global Mod, Mod
Newsletter Signup