Alpair 7P & Alpair 12PW combination.

[lorienblack]

I've ordered the wood to make the box for the 12pw 7p combo.

Did the diameter of the port ever get posted?

 

[zman01]

Lorien,

Good to know that you are one of the early adopters!

Plans in post #51 have the port diameter at 50mm - can you check please? Not sure of Dave captured that in subsequent revisions.

- Zia

 

[audionut44]

How good is this combo in the post #51 box likely to be? I have 7.3 pencils and love everything except the lack of dynamics and weighty bass (bass notes are there they just lack weight).

I'm either going to build these at a cost of about $600 for the parts or buy a pair of one of my favorite speakers ever made, the Audio Physic Step SLE for about the same price...

 

[chrisb]

Sean - I've yet to be underwhelmed by any of Scott's designs that I've built, but if you're only missing some visceral weight on the bottom, maybe a less costly step would be to go "FAST" with your current Pensils - HP them and add stereo woofers between 100 - 150?

However, if you're looking for an absolute guarantee, you may have already answered your own question. I've not heard the SLEs - they may well be worth every penny.

 

[Scottmoose]

The box referred to is supposed to form a starting point for people to play with as they wish. The alignments are solid, the XO is deliberately basic & can be changed or replaced with whatever you want.

Honestly though: given that you say the Audio Physic Step SLE is one of your favourite speakers, I'd buy those, since you'd probably regret not doing so.

 

[audionut44]

Thanks guys. The issue is that the Step SLE is a 4" driver based system as well. So while I'll surely love almost everything about them they'll still lack weight in the bass region. It really is a conundrum.

 

[chrisb]

I should think you could implement a decent solution to the bottom end for far less than $600, by retaining the Pensils and adding separate woofers - unless room is a constraint.

 

[audionut44]

The pensils are now in the living room and they're perfect there. This would be a new set of speakers for the dedicated listening room.

 

[chrisb]

hmmm - I'd be inclined to invest in the 7+12 - the only question would be passive or bi-amp

 

[Robertburchell]

The 7 + 12 with a Mini DSP and a pair of the low budget, high value chip amps (if you do not have 4 quality channels of amplification) could likely be had in or around your budget. This would allow you to experiment with crossover points, filters, EQ (if that's your thing), etc. Access to quality building materials and associated prices may make or break the budget however. Just another option.

 

[audionut44]

My amplification right now is a modified Adcom GFA5500. A bit of overkill for the MA drivers. I don't listen at very loud levels though.

MiniDSP is in my future for sure but I would start with a passive network.

 

[planet10]

... modified Adcom GFA5500. A bit of overkill for the MA drivers...

But likely very good for driving bass helpers

dave

 

[audionut44]

But likely very good for driving bass helpers

dave

This is true!

 

[Studio Au]

Speakercon pro connectors and complete Hypex active XO & Amps is my route so far. While not 'cheap' I think they are surprisingly good value, all things considered (digital pre-amp, in room correction, included cables, low power, small footprint, assembled and almost fool proof connecting etc)

My question at the moment I have the UcD180 modules which are 180w @ 4Ohm which will drive mids/tweets or full range.

Is it worth stumping a few quid more for the 400w version to drive any woofer, AND the 12PW.

Is 90w more than enough or worth having the headroom of 200w (@8Ohms)?

 

[chrisb]

there will of course be those who'd argue that no amount of headroom is too much, but I'm not among them - unless you're planning on running in a huge room, or at SPLs broaching the drivers SOA I'd wager the 90W would be sufficient

 

[Macfixer]

All this talk of power I was thinking that in my small room this would be great bi amped with my two sets of amp camp 6W Is that not the case?

 

[planet10]

1st passable of our 2nd take on an MTM ML-TL (with help from Woden) as another example of this combo

dave

 

[gaston senac]

1st passable of our 2nd take on an MTM ML-TL (with help from Woden) as another example of this combo

Nice one! It's great to see more designs for this combo coming. Thanks.

Can we have some details as how low, sensitivity, etc?

 

[planet10]

It does as low as it goes, Scott?

Sensitivity is the same as the A7p. Will be bi-amped.

We may try a passive but that brings almost 6 dB of bafflestep.

dave

 

[chrisb]

All this talk of power I was thinking that in my small room this would be great bi amped with my two sets of amp camp 6W Is that not the case?

you could certainly do worse - our own build will likely be passive LLXO / bi-amped -we have lots of choices in that department, including a pair of the ACAs - can't remember if Dave mentioned the frequency yet.