Category: ‘Blog’

Wharfedale Diamond 10.2 review part 3!

June 20, 2014 Posted by gornir

 


 
Part 3 of the review can be found here:

Wharfedale Diamond 10.2 review part 3

Regards

/Göran

Wharfedale Diamond 10.2 review part 2 Update!

June 8, 2014 Posted by gornir

 

 

I described in part 2 of my Wharfedale 10.2 review that my right loudspeaker didn’t sound and measure the same as the left loudspeaker.

The reason for this is:

  1. The mid-woofer had a mechanical creaky sound from the surround/suspension and even though it measured almost identical as the mid-woofer in the left loudspeaker the creaky sound could be heard in bass heavy recordings.
  2. The tweeter in the right loudspeaker had significant lower sensitivity which gave about 1.5-2dB lower output in the tweeter’s frequency response.

 

I contacted my local HiFi shop and supplier which immediately supplied me a new tweeter and mid-woofer.

I have now updated the part 2 review with some new measurements for the replacement drivers.

Wharfedale Diamond 10.2 review part 2

Regards

/Göran

Wharfedale Diamond 10.2 review part 2!

May 25, 2014 Posted by gornir

 


 
Part 2 of the review can be found here:

Wharfedale Diamond 10.2 review part 2

Regards

/Göran

Wharfedale Diamond 10.2 review part 1!

May 18, 2014 Posted by gornir

 

Part 1 of the review can be found here:

Wharfedale Diamond 10.2 review part 1

Regards

/Göran

Wharfedale Diamond 10.2 Review!

May 11, 2014 Posted by gornir

 

 

In a series of articles I will review the popular budget priced stand-mount loudspeaker Wharfedale Diamond 10.2. The Diamond 10.2 along with its smaller sibling Diamond 10.1 has got some good reviews among the Hifi Magazines around the world.

The Diamond 10.2 costs approximately 450$ and has roughly the same price as an entry level DIY loudspeaker of decent quality. In this article I will try to reveal some of the tradeoffs made in order to manufacture a loudspeaker in this price range compared to a DIY loudspeaker.  I will also explore the possibility to make some modifications to the original Diamond 10.2 design in order to make it sound better.

Unlike most Hifi Magazines who only review the loudspeaker and give it some subjective listening comments and sometimes some rudimentary measurements descriptions I will do the following:

First I will unpack the loudspeaker and describe what’s in the “package” and describe its build quality and chosen components. I will listen to the loudspeaker and give my subjective comments about the sound quality.

Then I will do a full set of measurements including on and off-axis frequency measurements, impedance and distortion measurements. I will comment my findings from the measurement results.

After that I will dissect the loudspeaker and un-mount the drivers, cross-over, ports  damping material and examine the cabinet construction in detail. I will measure each individual drivers frequency, impedance, distortion and analyze the cross-over etc.

Then I will do some cross-over simulation of the original cross-over and see if there are some possible improvements to be made to the original cross-over or if a complete remake of the cross-over is necessary. I will also make some suggestions on how to modify the original loudspeaker regarding cross-over component quality, cabinet damping and bracing etc.

Finally I will do a full set of new measurements of the (perhaps) modified loudspeaker along with new subjective listening impressions.

 

I hope you will enjoy this article series!

Regards

/Göran

Hifi Show Report!

March 8, 2014 Posted by gornir

 

I visited the High End Mässan 2014 HiFi Show last month and some pictures and comments can be read here:

HighEnd Stockholm 2014

Regards

/Göran

Satori Two – Monitor Construction Released!

January 3, 2014 Posted by gornir

 

SONY DSC

 

It´s time to publish the first AudioExcite loudspeaker design this year!

To the left in the above picture we have the new Satori Two – Monitor besides the “Sequence Three – Grand Reference” loudspeaker.

The Satori Two – Monitor is a large sized stand-mount loudspeaker and is based around the SB Acoustics Satori mid-woofer.

The Satori mid-woofer is a well behaved very nice sounding driver that sets a new standard for high-end drivers in its size. The 6.5” mid-woofer size fills a gap where it’s hard to find equivalent drivers today.

Either they are larger 7” mid-woofers, which are great in the bass department, but often lacks mid-range refinement and need to be crossed over below 2kHz. Or they are smaller 5-5.5” mid-woofers that are great in the mid-range, but struggles in the low bass department.

The Satori driver fills that gap with honor!

First, I planned to release the Satori Two – Monitor with two different tweeter options, the ScanSpeak R3004/602010 and the D3004/602010, but in the end the “D” version blended more nicely with the Satori mid-woofer and was sonically better than the “R” version.

That doesn’t mean that the “R” version tweeter isn’t any good, but it simply isn’t good enough in this configuration.

A comparison between the two tweeters can be found here: ScanSpeak Illuminator Tweeter Measurements!

For the Satori Two – Monitor construction details see: Satori Two – Monitor

 

Later this spring, I will build a pair of nice looking matching front covers for them!

 

Regards

/Göran

Fountek NeoCD3.5H Measurements!

December 22, 2013 Posted by gornir

neocd35-1neocd35-3

 

The Fountek NeoCD3.5H is a horn-loaded low priced ribbon tweeter with great frequency response and sonic performance.

I’ve used the NeoCD3.5H both in conventional 2-way monitor designs and in 2-way M-T-M designs with great success.

As many small sized ribbons the distortion profile is rather high, but if the cross-over frequency and filter topology is carefully chosen the NeoCD3.5H is a nice sounding affordable ribbon tweeter.

For detailed measurements see: Fountek NeoCD3.5H

SB Acoustics Mid-woofer Measurements!

December 20, 2013 Posted by gornir


(click on picture to zoom)

Left: SB15MFC30-4
Right: SB15NRXC30-4

Here’s a new set of measurements!

This time I’ve tested a pair of SB Acoustics 4Ω mid-woofers. The main difference between the two drivers is the cone material used. The SB15MFC30-4 uses a mineral filled Polypropylene (PP) cone and the SB15NRXC30-4 uses a coated Papyrus fiber cone.

They both share all other features like the same type of chassis, voice-coil, surround and motor system etc.

They are more alike than different in its measurement performance and it will be interesting to see if they subjectively sounds different from each other.

Detailed measurement data:

SB Acoustics SB15MFC30-4
SB Acoustics SB15NRXC30-4

SB15MFC30-4 vs. SB15NRXC30-4 comparison:

 

Build quality and looks:

At a first glance they both look confusingly similar to each other. The SB15MFC30-4 with its Polypropylene cone is slightly darker and shiny in its color compared to the coated structure of the SB15NRXC30-4.

They both have an impressive build quality with a high performance/price ratio.

Impedance:

 

Imp 1L SB15MFC30 vs SB15NRXC30

(click on picture to zoom)

Green = SB15MFC30-4
Blue = SB15NRXC30-4

They have  almost identical impedance plots besides the difference in the impedance peak of the resonance frequency (Fs).

Frequency:

 

Freq 0deg 1L SB15MFC30 vs SB15NRXC30Freq 15deg 1L SB15MFC30 vs SB15NRXC30

(click on picture to zoom)

Left: On-axis
Right: 15deg off-axis

Blue = SB15MFC30-4
Red = SB15NRXC30-4

They have almost the same frequency response in the mid-range. The PP cone of the SB15MFC30-4 rolls of a bit earlier than the SB15NRXC30-4, but they both have a very extended frequency response.

Distortion:

 

SB15MFC30-4-1L -- 15cm 95dbSB15NRXC30-4-1L -- 15cm 95db

(click on picture to zoom)

95dB @ 1m

Left = SB15MFC30-4
Right = SB15NRXC30-4

The SB15MFC30-4 has slightly higher odd-order distortion, but they are both good performers in this price class. When a proper cross-over design is in place, the difference should be negligible.

Summary:

 

These two mid-woofers are more alike than different from each other and it will be interesting to see how they sonically differ.

Based on the measurements performance I consider both these mid-woofer to be of high value and with a high performance/price ratio.

SB Acoustics Tweeter Measurements!

December 8, 2013 Posted by gornir

SB26STAC-C000-4_1SB26STCN-C000-4_1

These two SB Acoustics tweeters are the first in a series of new driver measurements I will publish on the website. I will probably use some of them in future moderately priced loudspeaker designs.

Detailed measurement data:

SB Acoustics SB26STAC-C000-4
SB Acoustics SB26STCN-C000-4

SB26STAC vs. SB26STCN comparison:

 

Build quality and looks:

The SB26STAC with its aluminium faceplates both looks and feels more robust than the SB26STCN plastic faceplate and its small Neodymium magnet. At this price level, 44$ for the SB26STAC and 35$ for the SB26STCN, they both seem to be very nicely built.

Impedance:

 

Imp 1L SB26STAC vs SB26STCN

(click on picture to zoom)

Green = SB26STAC
Blue = SB26STCN

The SB26STAC has a resonance frequency of 750Hz and the SB26STCN about 170Hz at 920Hz. Both are very close to the manufacturer specification. The Impedance profile is very similar from 2.5kHz and up.

Frequency:

 

Freq 0deg 2R SB26STAC vs SB26STCNFreq 15deg 2R SB26STAC vs SB26STCN

(click on picture to zoom)

Left: On-axis
Right: 15deg off-axis

Blue = SB26STAC
Red = SB26STCN

Note! SPL is normalized to roughly the same sensitivity

The tweeters have almost identical frequency response curves. The SB26STCN has about 0.5-1dB higher sensitivity than the SB26STAC.

Distortion:

 

SB26STAC-C000-4-2R -- 10cm 95dbSB26STCN-C000-4-2R -- 10cm 95db

(click on picture to zoom)

95dB @ 1m

Left = SB26STAC
Right = SB26STCN

The SB26STAC has lower distortion than the SB26STCN. A qualified guess is that the SB26STAC can be crossed over lower, at least 500Hz or more than the SB26STCN.

Summary:

 

The SB26STAC would fit nicely with mid-woofers up to 6.5” and the SB26STCN would fit nicely in M-T-M configurations or in small compact mini monitors with a mid-woofer size up to 5”

Based on the measurements performance I consider both these tweeters to be of high value and with a high performance/price ratio. It will be interesting to see if they also sonically turn out to be as good as the measurements.