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Hi-Fi systems

Rita_Poon said:
I didn't know that rule on speakers. They'd have vat on a glass of water if they could.

What's a year tree?

The former speakers, sold or storage? Are these new ones made from off cuts of the mahogany benches you recycled?
Click to expand...
Pear tree! Damn phone!

The wood is iroko i salvaged by being in the right place at the right time when science benches were being ripped out and replaced with modern crap. I shudder to think what the boards would cost to buy new.

I've sold a couple of former speakers, but am keeping the rest for now. A friend is aiming g to open an esoteric hifi boutique so I might lodge some for sale in there. My current ones he values at at least £10k ... but they're complex to sell because the buyer would need an active crossover and 2 stereo power amps to use them.
 
chrismpw said:
Pear tree! Damn phone!

The wood is iroko i salvaged by being in the right place at the right time when science benches were being ripped out and replaced with modern crap. I shudder to think what the boards would cost to buy new.

I've sold a couple of former speakers, but am keeping the rest for now. A friend is aiming g to open an esoteric hifi boutique so I might lodge some for sale in there. My current ones he values at at least £10k ... but they're complex to sell because the buyer would need an active crossover and 2 stereo power amps to use them.
Click to expand...
Reckon you have a step by step tutorial in you making a couple of very high end floor standing speakers? Simpler setup, single or dual out amp.
 

Rita_Poon said:
Reckon you have a step by step tutorial in you making a couple of very high end floor standing speakers? Simpler setup, single or dual out amp.
Click to expand...
Sure i could build a passive crossover in an afternoon, like most speakers have, but you lose so much precision and detail that way. Active is the way to go!
 
Rita_Poon said:
Please, I am a moron. What is the difference and what would I be listening for?
Click to expand...
Sinply:

Passive crossover - most speakers- the low and high frequencies are separated by a network of inductors and coils, ensuring the frequencies go to the correct driver (woofer low f and tweeters high f). Inductors filter out high f but they're big clumsy imprecise things that reduce the amplifiers' control over bass leaving it wooly - you hear a drone and fluff, instead of attack and timbre. The capacitors are relatively high value, so their accuracy is also not optimal (unless you measure and match pairs ... which costs).

Active crossover- using precise resistors and tiny value capacitors with op amps the same job is done with much more precision. This time the crossover is placed between the pre-amp and 2 power amps. There is nothing between the amp and speakers, meaning they exert full control over the driver ... when a drum kick is hit, the speaker starts moving and stops moving exactly when it should - it doesn't carry on, so there us no smearing of the bass.

Other things come into play- especially with passives, like phase differences that can completely ruin the stereo imagery.
 
chrismpw said:
Sinply:

Passive crossover - most speakers- the low and high frequencies are separated by a network of inductors and coils, ensuring the frequencies go to the correct driver (woofer low f and tweeters high f). Inductors filter out high f but they're big clumsy imprecise things that reduce the amplifiers' control over bass leaving it wooly - you hear a drone and fluff, instead of attack and timbre. The capacitors are relatively high value, so their accuracy is also not optimal (unless you measure and match pairs ... which costs).

Active crossover- using precise resistors and tiny value capacitors with op amps the same job is done with much more precision. This time the crossover is placed between the pre-amp and 2 power amps. There is nothing between the amp and speakers, meaning they exert full control over the driver ... when a drum kick is hit, the speaker starts moving and stops moving exactly when it should - it doesn't carry on, so there us no smearing of the bass.

Other things come into play- especially with passives, like phase differences that can completely ruin the stereo imagery.
Click to expand...
spock-shock.gif
 


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