数字功放与模拟功放相比具有的性能优势
<p>数字功放与模拟功放相比具有的性能优势：<br/><br/></p><p>1、重量轻、体积小：</p>
<p> 采用开关电源，大大缩小了传统变压器所占的庞大体积空间和重量空间，同时数字功放的高效率让功放低发热，直接导致散热装置的简化，使得整体重量和体积得到减少。</p>
<p> </p>
<p>2、效率高：</p>
<p> 同样的输出可以比模拟功放节约三分之二的电能，无论从节能方面还是经济方面都具有重要意义，高效率导致的低发热让数字功放比模拟功放更适合长时间工作，其寿命和稳定性将大大提高。</p>
<p> </p>
<p>3、失真小：<br/> 数字功放的高采样率保证了输入信号的逼真还原，对失真的控制能力也是模拟功放难以达到的。</p>
<p> </p>
<p>4、娱乐设施网络化：</p>
<p> 未来KTV娱乐系统必将走向VOD点歌系统和音响系统的网络集中控制时代，数字功放由于具有对数字信号的处理能力而将顺利地适应这样的发展趋势。</p>
<p> </p>
<p>5、噪声低：</p>
<p> 数字电路的使用将大大降低传统电路工作时产生的额外电流噪音，让数字功放的噪声接近于静音。</p>
<p>此外数字功放还具有：频响宽（数字功放为20Hz-20KHZ，传统功放为80Hz-10KHz）、动态大、震撼力度强等优点。</p>
<p> </p> <p><img src="http://www.nbhope.cn/upfile/201086179327842.jpg"/></p>
<p> </p>
<p><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体"><span><span><font size="3"><span><font size="3"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt"><span><span><font size="3"><span><font size="3"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt"><span><span><font size="3"><span><font size="3"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt"><span><span><font size="3"><span><font size="3"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">向往，来自民营品牌之都<span lang="EN-US">---</span>宁波！<span lang="EN-US"><br/></span>向往，始终以消费者的角色重视每一件产品，向往产品的完美源自精益追求理念和工业制造基础！<span lang="EN-US"><br/></span>向往，倡导科技和时尚的完美结合，所提供的已不仅仅是商品，而是代表着品位和格调、物质和精神完美融合的文化！</span></span></span></font></span></font></span></span></span></span></span></font></span></font></span></span></span></span></span></font></span></font></span></span></span></span></span></font></span></font></span></span></span><span lang="EN-US"><br/></span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt"><br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">向往，作为国内领先的背景音乐设备专业生产商，秉承一贯专业化策略，根据消费趋势不断为市场推出功能领先、外观时尚、性价比好的背景音乐系列产品，愿为您的生活提供更多便捷和舒适！<br/><br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt"><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">【产品名称】功放控制器奥乐<span lang="EN-US">808<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">【产品型号】<span lang="EN-US">HOPE4BGMA808<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">【产品简介】<br/></span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体"><span style="mso-spacerun: yes"> </span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">本款产品是当前行业内分体机中最优秀和畅销的产品。产品采用超大液晶显示屏，配合高亮蓝色背光，尽显高贵气派。表面采用拉丝贴膜，外观微小弧度设计，塑料件采用环保材料加工，表面喷油处理。功放和电源采用独立开关模式，更显人性化和安全。本款产品是集功率、音源、控制、时尚、实用于一体的高档数字小功放产品，得到同行、消费者、设计师和销售商的一致好评。<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">【产品功能介绍】<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 采用全新数字功放技术：发热小、失真小、噪声低、效率高、音质好！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 高保真立体声：</span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: Arial">能够还原出<span lang="EN-US">“</span>可信度<span lang="EN-US">”</span>很高的声音来源和声场定位！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■<span lang="EN-US"> 5</span>路音源选择<span lang="EN-US">:2</span>路公共音源（布线输入）和<span lang="EN-US">3</span>路本地音源<span lang="EN-US">(</span>内置<span lang="EN-US">FM+</span>内置<span lang="EN-US">SD</span>卡＋<span lang="EN-US">USB</span>外插<span lang="EN-US">)</span>！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 收音机功能：内置全数字自动调频收音机，<span lang="EN-US">30</span>个电台存储！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 存储卡功能：内置<span lang="EN-US">SD</span>卡，用户可取下通过读卡器下载更新，业内首创！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ <span lang="EN-US">USB</span>播放功能：支持<span lang="EN-US">USB</span>直接插入播放！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 通话自动静音功能：在使用固定电话时会自动静音，通话结束后自动恢复播放！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 定时开机功能，<span lang="EN-US">2</span>档定时开机，可预设时间！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 定时关机功能，<span lang="EN-US">9</span>档时间选择（<span lang="EN-US">10-90</span>分钟，每<span lang="EN-US">10</span>分钟一档）！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 时间显示功能：方便识别的<span lang="EN-US">24</span>小时制时间显示！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 音量调节：<span lang="EN-US">32</span>级电子音量调节功能！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 断电记忆功能：记忆上次关机前的状态！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 高低音调节功能！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 红外遥控功能！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">【产品技术指标】<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 电源：<span lang="EN-US">AC220V 50HZ <br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 输出功率：<span lang="EN-US">12W+12W</span>（<span lang="EN-US">MAX</span>）<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 输入阻抗：<span lang="EN-US">47 K</span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"Roman'; mso-hansi-font-family: 'Times New="New"Roman'">Ω<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 输出阻抗：<span lang="EN-US">8</span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New="New"Roman'; mso-hansi-font-family: 'Times New="New"Roman'">Ω<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 总谐波失真：<span lang="EN-US">0.03%<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 频响<span lang="EN-US"> 20Hz-20KHz<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ <span lang="EN-US">FM</span>收音机接收频率范围<span lang="EN-US">:88MHZ--108MHZ<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">■ 内存卡容量：<span lang="EN-US">32M-4G<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 红外遥控距离：≤<span lang="EN-US">10M<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ </span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">产品尺寸：</span><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">172*86*58MM(</span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">长<span lang="EN-US">*</span>宽<span lang="EN-US">*</span>厚<span lang="EN-US">)<br/></span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">【产品使用提醒】<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 推荐音箱：吸顶音箱<span lang="EN-US">701(HOPE5BGMB701)</span>、防水音箱<span lang="EN-US">536(HOPE2BGMB536)</span>、嵌入音箱<span lang="EN-US">538(HOPE3BGMB538)</span>、壁挂音箱<span lang="EN-US">531(HOPE3BGMB531)</span></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 配套底盒：</span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">预埋本公司配套的标准<span lang="EN-US">172</span>底盒<span lang="EN-US">(HOPE4BGMC172)</span>！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 线缆说明：</span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">本产品系统应用时用到<span lang="EN-US">5</span>种线缆：<span lang="EN-US">1</span>）电线：<span lang="EN-US">1-2</span>平方；<span lang="EN-US">2)</span>音频线<span lang="EN-US">(</span>两芯屏蔽线：俗称话筒线<span lang="EN-US">)</span>：<span lang="EN-US">RVVP2*0.3 RVVP2*0.5 RVVP2*0.75;3)</span>音响线（俗称金银线）：<span lang="EN-US">RVH2*100 RVH2*200</span>；<span lang="EN-US">4)</span>电话线：<span lang="EN-US">2</span>芯线；<span lang="EN-US">5)</span>天线：任何芯线都可以，比如一根铜线！<br/></span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">■ 布线提醒：</span><span style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体">多个点（多个房间、多个产品）时，布线采用并联方式，既可从线上并接，也可通过分线盒并接！<br/></span></span></span></p> 学习了 谢谢楼上朋友 <p>学习了</p>
<p> </p> <p>学习学习</p> <p>我们是做智能家庭自动化的， 我们选用的背景音乐就是这款，客人还是听满意的！</p> 简单。可靠性好。便宜。其他的都是浮云。
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