MARKBASS S450 amp - £200ono - *SOLD* £300 Hatfield

[oldslapper]

As our dad said 3x16ohm in parallel is 5.33, so I guess labelling the cab as 6ohm is rounding it up. 

[oldslapper]

I had an epifani 3x10 cab that was 6 ohm. 

[petecarlton]

I'm sorry to say that - despite all these really helpful explanations - I'm still not sure I understand.  I thought if you had 2 16ohm cabs, you could run them from an 8 ohm amp.  Are you saying that you can run three 16 ohm speakers (= 6ish ohm) from an 8 ohm amp, 6 being less than 8?  Or am I getting it completely the wrong way round (not by any means impossible)?

[oldslapper]

As a rule of thumb a SS amp should have a lower ohm rating than the cab(s) its driving.

So the 4ohm amp is fine with the 6ohm cab (or total cab configuration). 
An 8 ohm amp is not so fine with a 6 ohm cab (or total rated configuration).

I am no physicist though. 

[Dad3353]

5 hours ago, petecarlton said:

I'm sorry to say that - despite all these really helpful explanations - I'm still not sure I understand.  I thought if you had 2 16ohm cabs, you could run them from an 8 ohm amp.  Are you saying that you can run three 16 ohm speakers (= 6ish ohm) from an 8 ohm amp, 6 being less than 8?  Or am I getting it completely the wrong way round (not by any means impossible)?

I don't know of many amps that will not accept a load impedance of less than 8 Ohm. They doubtless exist, but not common, I'd say. Many combos, on the other hand, have an 8 Ohm speaker in them, but a socket for connecting a second cab, usually 8 Ohm too, so the amp 'sees' 4 Ohm. Connecting this 6 Ohm cab in such a situation would bring the total 'seen' by the amp to less than the 4 Ohm minimum (3.2 Ohm, if it's really a 5.3 cab...). Some amps won't mind this, as speaker impedance is not a fixed value anyway (it depends on many factors in Real Life Conditions...), but would not be advisable for long-term reliable operation, I'd suggest.
Hope this helps. 

Edited March 26, 2021 by Dad3353

[petecarlton]

8 hours ago, Dad3353 said:

Hope this helps. 

Thanks, Dad, getting there, I think!  😃

[TheGreek]

Cab on hold...

[TheGreek]

Cab sold

[prowla]

Could I suggest taking the amp out of the flight case (and saying flightcase & mounting kit available for free).

The thing looks awful on that Reverb ad, so that might improve the aesthetics. 🙂

[TheGreek]

Here you go. Let me know what photos you want specifically. 

[TheGreek]

On 18/04/2021 at 19:07, prowla said:

Could I suggest taking the amp out of the flight case (and saying flightcase & mounting kit available for free).

The thing looks awful on that Reverb ad, so that might improve the aesthetics. 🙂

That isn't this/my amp on the Reverb site - Italy I believe(?)..

New pics added.

[JottoSW1]

PM'd / Bump

[Leftfret]

Is this amp still for sale???

[TheGreek]

It is....

[Leftfret]

Hi,

Could be interested if you could let me have a shipping price to Uckfield East Sussex.

 

Also - any problems? - scratchy pots popular on MB gear after a few years - and how noisy is the fan??

[TheGreek]

Still here - funds from the sale go to my "new puppy fund"

[TheGreek]

[MacDaddy]

The first Bass Guitar Magazine I bought had a review of one of these. It was just before Markbass became known for lightweight stuff. IIRC it was a very good review, top bit of kit.

[Oldman]

A Little cheat sheet, takes the guesswork out of impedance(Ohms)

 

http://www.speakerimpedance.co.uk/?act=four_parallel&page=calculator

 

Cheque it out

[TheGreek]

Still here...

[Lfalex v1.1]

PM'd