CS-255 CD Hi-Fi Mini System
CD Hi-Fi Mini System
(iPhone not included)
Introduce Your iPhone® 5 to the Onkyo Sound
While there is always a place for all-in-one docking systems, you can’t beat a punchy amp and separate speakers for an authentic stereo
experience. The CS-255 CD Hi-Fi Mini System combines deeply satisfying audio quality—beyond what you would expect from such a
compact and affordable system—with playback support from a wide range of sources. Getting the tunes flowing is easy—just pop your
iPhone 5 into the charging dock and send music through the digital amp and out the weighty two-way bookshelf speakers, which each
boast a 3 15/16˝ (10 cm) woofer and 3/4˝ (2 cm) balanced-dome tweeter. The USB port connects older iPhone® and iPod® models, flash
memory drives loaded with MP3 files, as well as USB-compatible smartphones, with track selection supported via the system remote.
Then there’s a front-loading CD player, an FM/AM tuner capable of storing up to 60 of your favorite stations, and a 1/8˝ (3.5 mm) analog
input to connect other media players. All that remains is for you to sit back, relax, and listen as your music comes alive.
CR-255 CD Receiver
Amplifier/CD Player Features
• 15 W/Ch (6 Ohms, 1 kHz, 10% THD, 2 Channels
Driven, FTC)
• Efficient Digital Amplifier for Clear, Powerful Stereo
• Plays Audio CD, CD-R, CD-RW, and MP3-Encoded
• Front-Panel USB Port for Legacy iPod®/iPhone®,
Smartphones, and Flash Memory Devices
• Super Bass Function
• 3 Play Modes for CD (Normal/Random/Repeat)
• 2 Repeat Modes for CD (Disc/Track)
• Analog Audio Input for Media Player Connection
• Headphone Jack
• Tone Control (Bass/Treble)
*Discs should be properly finalized.
iPod/iPhone Charging Dock Features
Other Features
• Charging Dock with Lightning Connector for
iPhone® 5/iPod touch® (5G)/iPod nano® (7G)
• Direct-Digital Connection for Clearer Sound
• iPod/iPhone Control with Supplied Remote
• iPod/iPhone Auto Selector, Play Timer, and Sleep
• FM/AM Tuning with 60 Presets (30 + 30)
• Program Timer (Everyday)
• Sleep Timer
• Display Dimmer (Normal/Dim)
• Battery-Free Memory Backup
• Remote Control
USB Connection Features
D-T15 2-Way Bass Reflex Speakers
• Recharges iPod/iPhone
• iPod/iPhone Control with Supplied Remote
• Compatible Models: iPhone, iPhone (3G, 3GS, 4, 4S),
iPod touch (1G, 2G, 3G, 4G), iPod classic (6G),
and iPod nano (2G, 3G, 4G, 5G, 6G)
• Plays MP3 Files Stored on Flash Memory Devices and
USB-Compatible Smartphones/Tablets
• 3 15/16˝ (10 cm) Cone Woofer
• 3/4˝ (2.0 cm) Balanced-Dome Tweeter
• Non-Parallel Sides to Prevent Internal Standing
• Solid Construction, Fit, and Color-Matched Finish
• Magnetically Shielded to Prevent Interference
• Impedance: 6 Ohms
• Max. Input Power: 30 W
• Frequency Response: 55 Hz–50 kHz
CD Hi-Fi Mini System
Direct Digital Charging Dock for iPhone® 5
Super Bass Function
Dock your iPhone 5, iPod touch® (5G), or iPod nano® (7G)
via the Lightning Connector and recharge the device while
you listen. The receiver automatically detects your device,
selects dock input, and allows you to use the system remote
to quickly navigate to your desired track. Audio signals are
transported in pure digital form—bypassing the docked
device’s analog conversion and gain circuits—for noticeably
clearer, deeper, and more realistic sound.
Sometimes the music calls for a little extra bass punch.
The two-mode Super Bass function on the CS-255 gives a
welcome boost to the low-frequency band, adding just the
right amount of heft to bass guitar and kick drum without
sounding distorted, harsh, or boomy.
Connect, Charge, and Play via USB
Users of legacy iPhone and iPod models can link up in
moments via the front-panel charging USB port, which
also enables direct-digital audio transfer on these devices.
If your smartphone or tablet features a mini-USB port, you
can access the MP3 files stored on the device as well. You
can also plug in a flash memory drive and use the system
remote to select an MP3 library—no hassle, and no fuss.
Clean and Efficient Digital Amplifier
As well as being more energy-efficient than Class AB designs,
digital amplifiers are capable of producing remarkably clean,
detailed sound. Onkyo’s low-noise circuit topology reduces
distortion across a wide frequency bandwidth, resolving new
layers of depth and detail in your favorite recordings.
Smooth Front-Loading CD Player
While there is no shortage of weird and wonderful
CD-loading designs out there, the novelty wears off after
yet another scratched disc. The traditional front-loading CD
player remains the simplest and safest way to enjoy your
disc-based media. The CS-255 incorporates a smooth frontloading mechanism, while track- or album-repeat modes—
plus a random playback option—offer greater flexibility. And
it’ll even play your homemade mixes and MP3-encoded
compilation discs without any bother.
FM/AM Tuner with 60-Station Preset
Browse up to 60 of your favorite preset radio stations
(with 30 presets for the AM band, and 30 more for FM) at
the touch of a button, without fear of losing your original
program. Once you’ve got all your favorites locked in, you’ll
never be short of something to listen to again.
Compact and Solid Two-Way Speakers
The CS-255 includes a pair of two-way bass-reflex-type
speakers that incorporate a 3 15/16˝ (10 cm) woofer and a
3/ ˝ (2 cm) balanced-dome tweeter. The cabinets feature
stylish rounded edges and a front-to-rear taper that helps
reduce internal standing waves—an unwanted acoustic
resonance that can muddy the sound. Compact in size yet
surprisingly robust, these magnetically shielded speakers fit
comfortably and sound great almost anywhere you choose
to place them.
Amplifier Section
Power Output
15 W + 15 W (6 Ohms, 1 kHz, 10% THD,
2 Channels Driven, FTC)
THD+N (Total Harmonic Distortion + Noise)
0.5% (1 kHz, 1 W)
Damping Factor
60 (1 kHz, 8 Ohms)
Input Sensitivity and Impedance
1000 mV/47 k-ohms (Line)
Frequency Response
50 Hz–20 kHz/+0 dB, -3 dB
Tone Control
±10 dB, 100 Hz (Bass)
±10 dB, 10 kHz (Treble)
+4 dB, 80 Hz (Super Bass 1)
+8 dB, 80 Hz (Super Bass 2)
Signal-to-Noise Ratio
84 dB (Line, IHF-A)
Speaker Impedance
6 Ohms –16 Ohms
Tuner Section
Tuning Frequency Range FM
FM Preset Memory
AM Preset Memory
87.5 MHz–107.9 MHz
530 kHz–1710 kHz
30 Stations
30 Stations
Power Supply AC 120 V~, 60 Hz
Power Consumption 30 W
No-Sound Power Consumption
Standby Power Consumption
0.35 W (iPod/iPhone not connected)
Dimensions (W x H x D) 8 7/16˝ x 3 15/16˝ x 10 5/8˝
(215 x 100 x 270 mm)
5.5 lbs. (2.5 kg)
Speaker Type
2-Way, Bass-Reflex
3 15/16˝ (10 cm) Cone
3/4˝ (2.0 cm) Balanced-Dome
Tweeter Frequency Response
55 Hz–50 kHz
Crossover Frequency
4.5 kHz
Output Sound Pressure Level
82 dB/W/m
Max. Input Power
30 W
6 Ohms
Nominal Impedance
Dimensions (W x H x D)5 1/8˝ x 8 1/4˝ x 6 3/4˝
(130 x 210 x 172 mm)
3.5 lbs. (1.6 kg)
Dimensions (W x H x D) 13 1/16˝ x 7 1/2˝ x 16 7/8˝
(332 x 190 x 429 mm)
7.5 lbs. (3.4 kg)
Supplied Accessories
Due to a policy of continuous product improvement, Onkyo reserves the right to change specifications and appearance without notice. iPhone, iPod, iPod classic, iPod nano, iPod shuffle, and iPod touch are trademarks of Apple Inc., registered in the U.S. and other countries. “Made
for iPod” and “Made for iPhone” mean that an electronic device has been designed to connect specifically to iPod and iPhone respectively, and has been certified by the developer to meet Apple performance standards. Apple is not responsible for the operation of this device or its
compliance with safety and regulatory standards. Please note that the use of this device with iPod or iPhone may affect wireless performance. All other trademarks and registered trademarks are the property of their respective holders.
NPR No. 13N21 05/13
• Indoor FM antenna • AM loop antenna
• Speaker cable and cork spacers • Instruction manual
• Remote controller
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