Kchibo KK-S500 using the feeling,Radio Review


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First, the initial impression
At noon today, just received the KK-S500, the initial impression:

1, the machine flat, the antenna is not vertical;

2, FM stereo switch, headphone jack control, insert the stereo, open, pull out the stereo off, if you want to want to turn off stereo with headphones on to die;

3, good sound quality when using headphones, stereo FM sound band equalizer, high and low Millia, magnificent;

Packaging work, of course, with Japanese aircraft than there are gaps;

Two, really feel

After a few days use of the KK-S500, some feel reluctant to exclusive, spit faster. The reason is better than a few days the audition for a comprehensive grasp of the machine mettle it takes time to become familiar with the exploration, to do as far as possible objective and thoughtful, rather than get the machine rashly to conclusions, so as to avoid unfair. The paper comments on the reception performance of the machine are made under the conditions of the indoor whip antenna and receiving sites, a district of Shanghai Xuhui, indefinite periods of time. And the KK-S500 machine is DE1121, PL-550. Many of them had owned DE1103 contrast, that by virtue of the previous PL-550, DE1121 with the the DE1103 comparison of memory to compare, it may not be accurate.

, FM, KK-S500 headphones output sound quality is very good, high-bass Millia, bright treble, deep bass, and dive deeper, more aggressive than the PL-550 tri-band sound is also very balanced, and the convergence of the natural . I have had PL757 PL-550, the DE1103, DE1121, KK-S500 FM sound quality, personally think that is quite the style of HI-FI.

Particular, it was said that the FM noise floor, I can responsibly tell you that this is misleading! I hand on earplugs Sennheiser MX90 (impedance 64, sensitivity 119 can be relatively easy to detect background noise) carefully compared the DE1121 and KK-S500 noise floor almost all control well, the radio volume to zero (zero in order to objectively hear the background noise from the machine) can not hear the basic (but listen carefully or some).

PL-550 is different, the same volume to zero, that the slightest noise is still prevalent. And then adjust the volume, frequency transferred to stronger units, then the KK-S500, the DE1121 can only hear the noise floor of the radio broadcasting equipment, but this noise floor is not the slightest sound, yes we all know that the radio whining unique , this whining, I do not have to say that we should understand how the matter. PL-550 In addition to whining on both sides of the sound field can feel the sibilance, sibilance is the machine itself, the noise floor, and the more obvious when the headphones to listen to really too unpleasant!

Reception, the first FM sensitivity, KK-S500 is slightly inferior to the PL-550 and DE1121, which DE1121, the PL-550 is almost on the sensitivity of KK-S500 <DE1121 = PL-550, by virtue of the previous memory, DE1121 PL-550 and DE1103 matched. Look at selective, DE1121> PL-550> KK,-S500. We look at the example analysis.

Local FM 97.2 Shanghai Drama Desk, 97.7 Finance sandwiching wearing a 97.4 remote weak – Zhejiang News, the station is about 97.2 and 97.7 of these two local strong Taiwan the attack to bully, general machinery is difficult to receive DE1121 and PL-550 can be slightly under the conditions of this evil received 97.4, the frequency is transferred to 97.45, the best results, the effect of which DE1121 is superior to the PL-550 (PL-550 influenced by the strong Taiwan is slightly larger , but very subtle, indicating that selective DE1121> = PL-550), KK-S500 did not receive (or the sound of 97.2 or 97.7 of the sound).

It can be said that the 97.4 DE1121 and PL-550 can really survive in the cracks! In addition, I have deliberately such as after the 97.2,97.7 two stop to Taiwan, and then Kool-S500 try to close to 97.4, then you can receive, but the reception quality is slightly inferior to the same receiver under the DE1121 and PL-550, while the DE1121 and PL -550 is indeed equally matched, indicating that the sensitivity KK-S500 <DE1121 = KK-S500 the PL-550, selective <the PL-550 <= DE1121. Well, the FM reception point, has been able to fully explain the problem, not repeat them.

KK-S500 FM receiver performance is slightly worse than the DE1121 and PL-550, but its sound quality is better, and receive the difference in performance is subject to the the loom individual impact, and just only in the extreme case of the above conclusions, usually normal use, it can be said, no difference, or they are things of the same level.

2, MW and SW

AM sound quality, headphones to listen to KK-S500 sound quality than the DE1121 and PL-550 (DE1121 the PL-550 open broadband) boring some, that is the tone brightness, DE1121> PL-550> KK-the S500, but the PL -550 or even than the DE1121 can hear more details, which may benefit from the PL-550, 7K bandwidth, while the DE1121 for 6K, KK-S500 is not known, it is estimated that the details about 6.5K, because the sound of the KK-S500 on with the DE1121 is not underdogs. However, in the AM on the excessive pursuit of sound analytical details, seems to be a thankless task, because the technical specifications decided this does not greatly affect their reception quality. Comprehensive in terms of intelligibility, individuals think that the best of KK-S500, a long time did not tired! AM under the noise floor, I once again, DE1121, PL-550 ratio, conclusions and FM when compared to the same!

The SHORTWAVE the reception. KK-S500 and PL-550, a notch above the bottom of the KK-S500 noise control, their sense of hearing intelligibility better sensitivity, feeling that the KK-S500 is the best, that is, short-wave sensitivity, KK -S500> = PL-550> DE1121, but their difference is smaller than their differences in FM. Selectivity, medium wave and short-wave results of the comparison, I felt surprised. Selective medium wave, KK-S500 DE1121 >> PL-550, which KK-S500 is slightly stronger than the DE1121, but significantly stronger than the PL-550 (“>>”). Selective short-wave and KK-S500 and PL-550, but slightly stronger than the DE1121, namely the short-wave selective KK-S500 = PL-550> DE1121. Look at the Polish Case Study. MW, 648 for local traffic units, 657 for Jiaxing suburban Taiwan.
I geographical location of the 657 power is small, absolutely belongs to the remote level of weak units, under the rule of the clutches of 648, with KK-S500, it can be to survive adversity, but the PL-550 mercilessly strangle ! I heard on 657 with PL-550 is the 648’s sound, or even the frequency in to increase 658,659 in an attempt to escape the clutches 648, still to no avail. KK-S500, or even 656,655 no problem, I have to sigh, KK-S500 AM filter to select the performance strong.

Same DE1121 can also receive 657, but by 648 the effect is slightly stronger than in KK-S500, its intelligibility compromised, I turn DE1121 bandwidth switch to 4K, the effect is not as good as the KK-S500, this is also reflected in the short-wave selective PL-550 even if the bandwidth switch to the 5K, the conclusion of the selectivity was significantly inferior in KK-S500 or can not be changed. As for the medium-wave sensitivity, I did not feel a significant difference in the reception of weak units, KK-S500 and PL-550 sense of hearing is slightly stronger than the DE1121, but this difference is basic to be negligible.

Look at the short-wave case analysis. Voice of Malaysia, 11885 and 11880 Canton English, Australia, for example to compare. Both before and after the night 1900 fight, 11885 very weak signal at the unfavorable situation in the competition with 11,880, and good in my hand three machine can be received, and in KK-S500 and PL-550 , 11885 be emancipated, listen to basically no longer subject to the 11 880 of the oppressed. Indeed 11880 is relatively easy to capture listen to the positive view of this, the DE1121 is by listening to Voice of Malaysia 11880 interference, intelligibility discounted the other hand, the PL-550 and KK-S500, but independent of 11880 of the impact. I turn DE1121 bandwidth switch to 4K, the effect is still not as good as the first two.

KK-S500 selective excellent performance impressed, thought to try the KK-S500 synchronous detection, and see if we can further improve the listening experience. But the results I am a little disappointed, synchronous detection, a function of the KK-S500 bright spot, however, failed to give me a good impression, how to say it can not be said to have no effect, but the effect is obvious, but not when can synchronous detector successful lock Moreover, in two fights, I can fine-tune the frequency approach will want to listen to the sets of frequency detuning-2KHZ to obtain more effective than listening, so I feel that this feature does not seem .

Or return to selective up a word, the PL-550 and KK-S500 no clear winner, but were better than the DE1121. Look at the sensitivity difference of three machines and Polish, less obvious, in the weak units receiving PK, KK-S500 in the sense of hearing is slightly stronger than the PL-550, rather than DE1121 feel intelligibility is better. Coupled with the PL-550, comparing the DE1103, so the assertion that this four machine at the same level on the sensitivity.

3, power endurance
KK-S500 electricity life is good, very good power-saving than the DE1121 and PL-550.

The above is a few days of listening experience, in general, KK-S500 is a very good Ministry of machine on the use of the feelings of its individual subjective consciousness and machine individual differences influence, but still the hope that useful. To mention a different view!

Following a few hopes and views, to hope Kchibo to attach importance to:

FM stereo, you should add another switch, the benefits are simple, I can turn off the stereo headphones to listen to, so you can get better reception. Here, I must mention that my machine just to get this stereo function when listening to FM is always open, whether or not the headphones are, to say, listen to FM stereo decoder circuit seems delirious , regardless of how weak signal strength, in the state of the stereo demodulator (ie: This feature does not turn on / off automatically with the signal strength, but has been turned on, including stereo sound and LCD screen instructions are in the stereo state ), mono FM switch to AM shortwave stereo instructions on the LCD screen disappear, but a switch to the FM opened. Later, I adjusted the clock, in order to adjust the second hand, reset the machine, this function was normal. When it comes to adjusting the clock, and I hope that after the set time, the second hand auto-zero, so do not reset after this point if the DE1121 is, as long as the reset time, the second hand on zero.

2, the antenna is not perpendicular to the machine flat. This is not to say the mold tune should be solved.

3, the machine in an upright, the disk instability. This DE1121 and PL-550 do very well, unlike the KK-S500, and a little not pay attention to put on the instability and even to worry about a wind blown.

4, the shielding effect of the machine compared with the PL-550 a gap on the front of a computer, the PL-550 significantly affected smaller;

5, the volume potentiometer. My machine, the volume of the left and right channels are not balanced, the right of the volume open hours normal volume when the volume and headphones to listen to when you can not open, even if the potentiometer to a great, does not sound comfortable. Hope to solve the problem of left and right volume imbalance! Of course, referred to the volume, and also hope to be like the DE1121 as headphone output and the machine comes with speakers set up an independent power amplifier circuit.

6, the medium-wave listening, part of the band does have keypad tones, FM and shortwave were not found to have this problem.

7, my machines amplitude modulation deviation, personal down seriously with the DE1121 and PL-550 is a high frequency of 1.5KHZ about listening above will reduce the frequency of the 1-2KHZ in order to achieve the best reception, I do not know other friends the same problem? If the individual machine problems and hope Kchibo help solve.

On software problems, the personal view that no major problems with get used to it, but still hope Kchibo can humbly learn from the other benefits of the product, combined with their own advantages, and make it more perfect.

Kchibo KK-S500 2


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