Speakers b&w cm8 s2 test
The S2 is the smaller of two floorstanders in the new line-up: in that slightly wacky way they have down in Worthing, within each series the larger the number the smaller the speaker. This in turn helps keep resonances at bay. Above these drivers, and mounted in its own gel-filled cavity to decouple it from the main cabinet, is the new 25mm Decoupled Double Dome aluminium tweeter, which uses a cut-away second skin on the dome to improve rigidity without adding too much mass. As they say in the furniture catalogues, some home assembly is required when the s are unpacked, but not much: the plinths have to be attached to the base of the cabinet using bolts, spacers and washers for which an Allen key is provided , and then either rubber feet — for hard floors — or carpet-piercing spikes and locknuts are fitted to the plinth. However, after some use to flex the driver surrounds and get some heat into them, they soon settle down and show just what they can do. If the speaker has been stored in a cold environment, the damping compounds and suspension materials of the drive units will take some time to recover their correct mechanical properties.
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Content:
- B&W CM8 S2 manual
- B&W Bowers and Wilkins CM8 S2 Floorstanding Speakers
- B&W CM8 Floorstanding Speaker System Review
- B&W CM8 review
- Bowers & Wilkins 704 S2 loudspeaker review: These floor-standers sound as exquisite as they look
- Speaker in perfect balance
- Avensys Home. Call us on 01293 515050
- Are you human?
- Review: Bowers & Wilkins CM8 S2, CMC S2 and CM5 S2 speakers
- Bowers & Wilkins CM8S2 Floorstanding Speakers in Gloss Black - Preowned
B&W CM8 S2 manual
Where exactly to measure difference cm tweeter and woofer. To my very limited understanding, when working with LR filters, it's important to have the cones tweeter, mid and woofer properly alligned.
In order to do that, I have to measure the distance between the cones and a fixed point e. Where exactly do you need to measure? In the past I've used the 'invert' option on the plate amps to determine the delay in the tweeter by seeing a dip at the crossover frequency using LR4 filters. However, this was done after designing the crossovers and I'd like to implement the tweeter delay before the design.
Any tips? IF you have the possibility to stagger the drivers instead of mounting them to the same plane, a flat front baffle, the "point source" for each can be considered the voice coil to cone or dome joint.
So if, say, you have 2 drivers, a woofer and a tweeter and the woofer cone is , say, 8 cm deep and the tweeter is, say, 1 cm deep, you can mount the tweeter 7 cm further back than where it would seat if screwed to the main front panel. PS: just checked your picture, to me those are VERY conventional cone speakers, just with a funny plug glued to the magnet pole piece If used as is, you will NOT correct for the time delay difference by tweaking the passive crossover; now if you use an active crossover and separate amplifiers, you can slightly delay the signal sent to tweeter.
The easiest solution would be to place the tweeter in its own small enclosure and sit it on top of the cabinet, a few cm to the back. Measure and do the Math to find how many. Originally Posted by Geertidow. Hi Allen, Thanks for your response. With the FA plate amps from Hypex, you can easly delay the tweeter response. There are multiple ways of doing this using REW e. The strategy you describe in your first post makes me think you want to reference the distances to the listening position?
There are many ways you can do that. For example you could measure each driver at a fixed distance from the baffle, and then calculate the different distances to the listening position. Be careful about time adjusting drivers that are working together, this can upset their acoustic behaviour. And due to reactive components in the drivers giving phase shifts, the acoustical vertical centre, which in the end is the only one that counts, may be different from the physical center.
It is a system, not a bunch of components. Thanks for your responses. Since I'll be listening at tweeter height at approximately 2. In the past months of using my filters build with the help of this forum , I found out that I corrected way to much small dips and bumps and after removing them the system sounds better.
Therefore and since I have some extra spare time the coming weeks I decided to do a new fresh round of filter designing given that I now a little bit better what my preferences are.
My plan is to adjust the speaker isolation burrito technique since I maybe now overdid the isolation on the inner sides of the speakers. Then I'd like to remeasure the frequency responses of the drivers and design various LR filters 2nd, 4th and 8th order and optimizing them and see what results I get both on- and off-axis. The first round of filter designing gave very satisfactory results, and I'd like to go for a new round to see if I can improve the result a little.
Hi, a few thoughts First, if you stick with LR filters, there is no time difference to account for from the xover, when using the same xover frequency on both sides. Which is really cool, because the timing offset stays the same as you try the different LR orders.
Fully complemetary xovers totally rock imo, The measured time difference between the acoustic centers should be reasonably close to the coil alignment difference guesstimate I've measured the coil differences at 2. I don't use REW in dual channel mode I measure each speaker individually just to check if I'm interpreting dual channel mode correctly. Another trick I learned earlier was to design the filters let's say LR 4th order and then invert the tweeter and afterwards the mid-woofer to see if a dip arises at the XO frequency.
At the greatest dip the timing is perfectly or near that alligned because of the phase difference. As you can read, I'm still learning and searching towards the best method. However, on other note, I just redid the isolation of the speakers towards a burrito method on the woofers and the effect seems positive in terms of muffled 'reverberations' I don't know the appropriate term.
However, a placebo effect is also likely since I've spend and hour or two on performing the task. BB code is On. Smilies are On. Forum Rules. All times are GMT. The time now is PM. Resources saved on this page: MySQL User Name. Stay logged in? Mark Forums Read. Multi-Way Conventional loudspeakers with crossovers. Please consider donating to help us continue to serve you.
Page 1 of 6. Last ». Thread Tools. View Public Profile. Send a private message to Geertidow. Find More Posts by Geertidow. Send a private message to JMFahey. Quote: Originally Posted by Geertidow when working with LR filters, it's important to have the cones tweeter, mid and woofer properly alligned.
Send a private message to AllenB. Find More Posts by AllenB. Send a private message to TNT. Send a private message to mark Find More Posts by mark Posting Rules. Similar Threads. How to measure Qts of my woofer? Where to measure max. Measure of tweeter respons. Frequently Asked Questions Did you forget your password?
B&W Bowers and Wilkins CM8 S2 Floorstanding Speakers
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B&W CM8 Floorstanding Speaker System Review
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B&W CM8 review
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Bowers & Wilkins 704 S2 loudspeaker review: These floor-standers sound as exquisite as they look
It has been a while since we have tested loudspeakers for an above average home cinema system, but we are now working on it right away. As you may have read in our many reviews, we use a fixed reference system for testing products, including receivers and televisions. In this way we can compare products better and we also get the most out of these products. Time for an upgrade of our reference system. With a total price of around 4, euros, this complete CM S2 system is not available for every consumer.
Speaker in perfect balance
We are not able to respond back to you, so if the ad remains on site after 12 hours then we have chosen to leave the ad live. If you are a victim of fraud click here. These speakers are in excellent condition as the photos show, sound amazing and they come with their original grilles and bases. This is a truly great set of speakers at a great price and if you really want the best sound from your hifi or home cinema set up then look no further. Due to the weight of these they will be collection only.
Avensys Home. Call us on 01293 515050
The CM8s have stunning midrange, but an inconsistent character takes the gloss off. FST stands for Fixed Suspension Transducer and relates to the bright yellow Kevlar cone only having the smallest of surrounds. The idea is that the surround damps the cone optimally to produce the purest possible sound.
Are you human?
RELATED VIDEO: b\u0026w cm8 s2GR VAT. Read more. The CM8 is an elegantly proportioned, slimmed down version of the award-winning CM9. A true three-way loudspeaker that will appeal to discerning customers who demand the very best sound quality, but have limited space in which to achieve it. Like all the models in the CM Series, the CM8 uses crossovers of remarkable simplicity and quality, so what you hear is that much closer to the sound of the original recording. Pure and simple.
Review: Bowers & Wilkins CM8 S2, CMC S2 and CM5 S2 speakers
JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. Call or Email Us now for a pricing. The CM8 S2 takes advantage of three Kevlar drivers and a Decoupled Double Dome tweeter housed acoustically for the precise audio response. With a cabinet, just mm wide, CM8 S2 will fit in any room.
Bowers & Wilkins CM8S2 Floorstanding Speakers in Gloss Black - Preowned
Recommended usage: Universal. Speaker type: 3-way, Audio output channels: 1. Connectivity technology: Wired.
they still remind you of the 18th century
It clings, clings. well written!
What is he planning?